Recent Publications

Journal Article (142)

1.
Journal Article
Seo, J.; Kim, D.; Gewinner, S.; Schöllkopf, W.; Bowers, M. T.; Pagel, K.; Helden, G. v.: Infrared multiple photon dissociation spectroscopy of protonated amino acid clusters with non-interacting side chains in the gas phase. International Journal of Mass Spectrometry 508, 117394 (2025)
2.
Journal Article
Torres-Boy, A. Y.; Taccone, M.; Ober, K.; Osenton, M. B. T.; Meijer, G.; Helden, G. v.; Martínez-Haya, B.: Spectroscopic investigation of proton bonding at sub-kelvin temperatures. Physical Chemistry Chemical Physics (2024)
3.
Journal Article
Safferthal, M.; Greis, K.; Chang, R.; Chang, C.-W.; Hoffmann, W.; Meijer, G.; Helden, G. v.; Pagel, K.: The impact of side-chain fluorination on proton-bound phenylalanine dimers: a cryogenic infrared spectroscopic study. Physical Chemistry Chemical Physics 26 (44), pp. 28155 - 28160 (2024)
4.
Journal Article
Dahlmann, F.; Griesbach, C. E.; Torres-Boy, A. Y.; Helden, G. v.; Peczuh, M. W.; Pagel, K.; Greis, K.: Direct Experimental Characterization of a Sialyl Cation. Chemistry – A European Journal, e202403724 (2024)
5.
Journal Article
Chang, C.-W.; Greis, K.; Prabhu, G. R. D.; Wehner, D.; Kirschbaum, C.; Ober, K.; Torres-Boy, A. Y.; Leichnitz, S.; Meijer, G.; Helden, G. v. et al.; Seeberger, P. H.; Pagel, K.: Mechanistic insight into benzylidene-directed glycosylation reactions using cryogenic infrared spectroscopy. Nature Synthesis 3, pp. 1377 - 1384 (2024)
6.
Journal Article
Kirschbaum, C.; Greis, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.; Urner, L. H.: Structure and Conformation Determine Gas-Phase Infrared Spectra of Detergents. ChemPlusChem 89 (10), e202400340 (2024)
7.
Journal Article
Meijer, G.; Helden, G. v.: Metal Monoxide Abundances as a Function of the C/O Ratio. ACS Earth and Space Chemistry 8 (9), pp. 1690 - 1692 (2024)
8.
Journal Article
Jara-Toro, R. A.; Taccone, M. I.; Dezalay, J.; Noble, J. A.; Helden, G. v.; Pino, G. A.: Observation of a core-excited dipole-bound state ∼1 eV above the electron detachment threshold in cryogenically cooled acetylacetonate. The Journal of Chemical Physics 161 (8), 084305 (2024)
9.
Journal Article
Kirschbaum, C.; Greis, K.; Torres-Boy, A. Y.; Riedel, J.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Studying the Intrinsic Reactivity of Chromanes by Gas-Phase Infrared Spectroscopy. Journal of the American Society for Mass Spectrometry 35 (8), pp. 1950 - 1958 (2024)
10.
Journal Article
Torres-Boy, A. Y.; Taccone, M.; Kirschbaum, C.; Ober, K.; Stein, T.; Meijer, G.; Helden, G. v.: Investigation of the Proton-Bound Dimer of Dihydrogen Phosphate and Formate Using Infrared Spectroscopy in Helium Droplets. The Journal of Physical Chemistry A (2024)
11.
Journal Article
Greis, K.; Kirschbaum, C.; Ober, K.; Taccone, M.; Torres-Boy, A. Y.; Meijer, G.; Pagel, K.; Helden, G. v.: Infrared Spectroscopy of Fluorenyl Cations at Cryogenic Temperatures. The Journal of Physical Chemistry Letters 14 (50), pp. 11313 - 11317 (2023)
12.
Journal Article
Safferthal, M.; Greis, K.; Chang, R.; Kirschbaum, C.; Hoffmann, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Cryogenic infrared spectroscopy reveals remarkably short NH+⋯F hydrogen bonds in fluorinated phenylalanines. Physical Chemistry Chemical Physics 25 (36), pp. 24783 - 24788 (2023)
13.
Journal Article
Lettow, M.; Greis, K.; Mucha, E.; Lambeth, T. R.; Yaman, M.; Kontodimas, V.; Manz, C.; Hoffmann, W.; Meijer, G.; Julian, R. R. et al.; Helden, G. v.; Marianski, M. R.; Pagel, K.: Decoding the Fucose Migration Product during Mass-Spectrometric Analysis of Blood Group Epitopes. Angewandte Chemie International Edition 62 (24), e202302883 (2023)
14.
Journal Article
Greis, K.; Griesbach, C. E.; Kirschbaum, C.; Meijer, G.; Helden, G. v.; Pagel, K.; Peczuh, M. W.: Characterization and Fate of a Septanosyl Ferrier Cation in the Gas and Solution Phases. The Journal of Organic Chemistry 88 (9), pp. 5543 - 5553 (2023)
15.
Journal Article
Taccone, M.; Thomas, D.; Ober, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.: Infrared action spectroscopy of the deprotonated formic acid trimer, trapped in helium nanodroplets. Physical Chemistry Chemical Physics 25 (15), pp. 10907 - 10916 (2023)
16.
Journal Article
Riedel, J.; Lettow, M.; Grabarics, M.; Götze, M.; Miller, R. L.; Boons, G.-J.; Meijer, G.; Helden, G. v.; Szekeres, G. P.; Pagel, K.: Predicting Structural Motifs of Glycosaminoglycans using Cryogenic Infrared Spectroscopy and Random Forest. Journal of the American Chemical Society 145 (14), pp. 7859 - 7868 (2023)
17.
Journal Article
Kirschbaum, C.; Young, R. S. E.; Greis, K.; Menzel, J. P.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Causon, T.; Narreddula, V. R. et al.; Poad, B. L. J.; Blanksby, S. J.; Pagel, K.: Establishing carbon-carbon double bond position and configuration in unsaturated fatty acids by gas-phase infrared spectroscopy. Chemical Science 14 (10), pp. 2518 - 2527 (2023)
18.
Journal Article
Greis, K.; Leichnitz, S.; Kirschbaum, C.; Chang, C.-W.; Lin, M.-H.; Meijer, G.; Helden, G. v.; Seeberger, P. H.; Pagel, K.: The Influence of the Electron Density in Acyl Protecting Groups on the Selectivity of Galactose Formation. Journal of the American Chemical Society 144 (44), pp. 20258 - 20266 (2022)
19.
Journal Article
Kirschbaum, C.; Greis, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Cryogenic infrared spectroscopy provides mechanistic insight into the fragmentation of phospholipid silver adducts. Analytical and Bioanalytical Chemistry 414 (18), pp. 5275 - 5285 (2022)
20.
Journal Article
Greis, K.; Kirschbaum, C.; Taccone, M.; Götze, M.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Studying the Key Intermediate of RNA Autohydrolysis by Cryogenic Gas-Phase Infrared Spectroscopy. Angewandte Chemie International Edition 61 (19), e202115481 (2022)
21.
Journal Article
Greis, K.; Kirschbaum, C.; Taccone, M.; Götze, M.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Untersuchung des reaktiven Intermediats der RNA Autohydrolyse mittels kryogener Infrarotspektroskopie in der Gasphase. Angewandte Chemie 134 (19), e202115481 (2022)
22.
Journal Article
Greis, K.; Kirschbaum, C.; Fittolani, G.; Mucha, E.; Chang, R.; Helden, G. v.; Meijer, G.; Delbianco, M.; Seeberger, P. H.; Pagel, K.: Neighboring Group Participation of Benzoyl Protecting Groups in C3- and C6-Fluorinated Glucose. European Journal of Organic Chemistry 2022 (15), e202200255 (2022)
23.
Journal Article
Greis, K.; Kirschbaum, C.; Helden, G. v.; Pagel, K.: Gas-phase infrared spectroscopy of glycans and glycoconjugates. Current Opinion in Structural Biology 72, pp. 194 - 202 (2022)
24.
Journal Article
Thomas, D.; Taccone, M.; Ober, K.; Mucha, E.; Meijer, G.; Helden, G. v.: Helium Nanodroplet Infrared Action Spectroscopy of the Proton-Bound Dimer of Hydrogen Sulfate and Formate: Examining Nuclear Quantum Effects. The Journal of Physical Chemistry A 125 (42), pp. 9279 - 9287 (2021)
25.
Journal Article
Kirschbaum, C.; Greis, K.; Polewski, L.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Unveiling Glycerolipid Fragmentation by Cryogenic Infrared Spectroscopy. Journal of the American Chemical Society 143 (36), pp. 14827 - 14834 (2021)
26.
Journal Article
Grabarics, M.; Lettow, M.; Kirk, A. T.; Helden, G. v.; Causon, T. J.; Pagel, K.: Plate-height model of ion mobility-mass spectrometry: Part 2-Peak-to-peak resolution and peak capacity. Journal of Separation Science 44 (14), pp. 2798 - 2813 (2021)
27.
Journal Article
Kirschbaum, C.; Greis, K.; Lettow, M.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Non-covalent double bond sensors for gas-phase infrared spectroscopy of unsaturated fatty acids. Analytical and Bioanalytical Chemistry 413 (14), pp. 3643 - 3653 (2021)
28.
Journal Article
Lettow, M.; Greis, K.; Grabarics, M.; Horlebein, J.; Miller, R. L.; Meijer, G.; Helden, G. v.; Pagel, K.: Chondroitin Sulfate Disaccharides in the Gas Phase: Differentiation and Conformational Constraints. The Journal of Physical Chemistry A 125 (20), pp. 4373 - 4379 (2021)
29.
Journal Article
Kirschbaum, C.; Greis, K.; Mucha, E.; Kain, L.; Deng, S.; Zappe, A.; Gewinner, S.; Schöllkopf, W.; Helden, G. v.; Meijer, G. et al.; Savage, P. B.; Marianski, M.; Teyton, L.; Pagel, K.: Unravelling the structural complexity of glycolipids with cryogenic infrared spectroscopy. Nature Communications 12 (1), 1201 (2021)
30.
Journal Article
Greis, K.; Kirschbaum, C.; Leichnitz, S.; Gewinner, S.; Schöllkopf, W.; Helden, G. v.; Meijer, G.; Seeberger, P. H.; Pagel, K.: Direct Experimental Characterization of the Ferrier Glycosyl Cation in the Gas Phase. Organic Letters 22 (22), pp. 8916 - 8919 (2020)
31.
Journal Article
Grabarics, M.; Lettow, M.; Kirk, A. T.; Helden, G. v.; Causon, T. J.; Pagel, K.: Plate-height model of ion mobility-mass spectrometry. Analyst 145 (19), pp. 6313 - 6333 (2020)
32.
Journal Article
Thomas, D.; Chang, R.; Mucha, E.; Lettow, M.; Greis, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.: Probing the conformational landscape and thermochemistry of DNA dinucleotide anions via helium nanodroplet infrared action spectroscopy. Physical Chemistry Chemical Physics 22 (33), pp. 18400 - 18413 (2020)
33.
Journal Article
Greis, K.; Mucha, E.; Lettow, M.; Thomas, D.; Kirschbaum, C.; Moon, S.; Pardo-Vargas, A.; Helden, G. v.; Meijer, G.; Gilmore, K. et al.; Seeberger, P. H.; Pagel, K.: The Impact of Leaving Group Anomericity on the Structure of Glycosyl Cations of Protected Galactosides. ChemPhysChem 21 (17), pp. 1905 - 1907 (2020)
34.
Journal Article
Lettow, M.; Grabarics, M.; Greis, K.; Mucha, E.; Thomas, D.; Chopra, P.; Boons, G.-J.; Karlsson, R.; Turnbull, J. E.; Meijer, G. et al.; Miller, R. L.; Helden, G. v.; Pagel, K.: Cryogenic Infrared Spectroscopy Reveals Structural Modularity in the Vibrational Fingerprints of Heparan Sulfate Diastereomers. Analytical Chemistry 92 (15), pp. 10228 - 10232 (2020)
35.
Journal Article
Kirschbaum, C.; Saied, E. M.; Greis, K.; Mucha, E.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Poad, B. L. J.; Blanksby, S. J. et al.; Arenz, C.; Pagel, K.: Resolving Sphingolipid Isomers Using Cryogenic Infrared Spectroscopy. Angewandte Chemie International Edition 59 (32), pp. 13638 - 13642 (2020)
36.
Journal Article
Kirschbaum, C.; Saied, E. M.; Greis, K.; Mucha, E.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Poad, B. L. J.; Blanksby, S. J. et al.; Arenz, C.; Pagel, K.: Unterscheidung von isomeren Sphingolipiden mittels kryogener Infrarotspektroskopie. Angewandte Chemie 132 (32), pp. 13740 - 13744 (2020)
37.
Journal Article
Marianski, M.; Mucha, E.; Greis, K.; Moon, S.-Y.; Pard, A.; Kirschbaum, C.; Thomas, D.; Meijer, G.; Helden, G. v.; Gilmore, K. et al.; Seeberger, P. H.; Pagel, K.: Remote Participation during Glycosylation Reactions of Galactose Building Blocks: Direct Evidence from Cryogenic Vibrational Spectroscopy. Angewandte Chemie International Edition 59 (15), pp. 6166 - 6171 (2020)
38.
Journal Article
Marianski, M.; Mucha, E.; Greis, K.; Moon, S.-Y.; Pard, A.; Kirschbaum, C.; Thomas, D.; Meijer, G.; Helden, G. v.; Gilmore, K. et al.; Seeberger, P. H.; Pagel, K.: Fernpartizipation in Glykosylierungen von Galaktose‐Bausteinen: Direktnachweis durch kryogene Schwingungsspektroskopie. Angewandte Chemie 132 (15), pp. 6224 - 6229 (2020)
39.
Journal Article
Lettow, M.; Grabarics, M.; Mucha, E.; Thomas, D.; Polewski, L.; Freyse, J.; Rademann, J.; Meijer, G.; Helden, G. v.; Pagel, K.: IR action spectroscopy of glycosaminoglycan oligosaccharides. Analytical and Bioanalytical Chemistry 412 (3), pp. 533 - 537 (2020)
40.
Journal Article
Lee, J. B.; Jeon, M. H.; Seo, J. K.; Helden, G. v.; Rohde, J.-U.; Zhao, B. S.; Seo, J.; Hong, S. Y.: Annulative π-Extension of Unactivated Benzene Derivatives through Nondirected C-H Arylation. Organic Letters 21 (17), pp. 7004 - 7008 (2019)
41.
Journal Article
Lettow, M.; Mucha, E.; Manz, C.; Thomas, D.; Marianski, M.; Meijer, G.; Helden, G. v.; Pagel, K.: The role of the mobile proton in fucose migration. Analytical and Bioanalytical Chemistry 411 (19), pp. 4637 - 4645 (2019)
42.
Journal Article
Hoffmann, W.; Langenhan, J.; Huhmann, S.; Moschner, J.; Chang, R.; Accorsi, M.; Seo, J.; Rademann, J.; Meijer, G.; Koksch, B. et al.; Bowers, M. T.; Helden, G. v.; Pagel, K.: An Intrinsic Hydrophobicity Scale for Amino Acids and Its Application to Fluorinated Compounds. Angewandte Chemie International Edition 58 (24), pp. 8216 - 8220 (2019)
43.
Journal Article
Hoffmann, W.; Langenhan, J.; Huhmann, S.; Moschner, J.; Chang, R.; Accorsi, M.; Seo, J.; Rademann, J.; Meijer, G.; Koksch, B. et al.; Bowers, M. T.; Helden, G. v.; Pagel, K.: Eine intrinsische Hydrophobieskala für Aminosäuren und ihre Anwendung auf fluorierte Verbindungen. Angewandte Chemie 131 (24), pp. 8300 - 8304 (2019)
44.
Journal Article
Thomas, D.; Mucha, E.; Lettow, M.; Meijer, G.; Rossi, M.; Helden, G. v.: Characterization of a trans-trans Carbonic Acid-Fluoride Complex by Infrared Action Spectroscopy in Helium Nanodroplets. Journal of the American Chemical Society 141 (14), pp. 5815 - 5823 (2019)
45.
Journal Article
Marianski, M.; Seo, J.; Mucha, E.; Thomas, D.; Jung, S.; Schlögl, R.; Meijer, G.; Trunschke, A.; Helden, G. v.: Structural Characterization of Molybdenum Oxide Nanoclusters Using Ion Mobility Spectrometry-Mass Spectrometry and Infrared Action Spectroscopy. The Journal of Physical Chemistry C 123 (13), pp. 7845 - 7853 (2019)
46.
Journal Article
Mucha, E.; Marianski, M.; Xu, F.-F.; Thomas, D.; Meijer, G.; Helden, G. v.; Seeberger, P. H.; Pagel, K.: Publisher Correction: Unravelling the structure of glycosyl cations via cold-ion infrared spectroscopy. Nature Communications 9, 4767 (2018)
47.
Journal Article
Mucha, E.; Marianski, M.; Xu, F.-F.; Thomas, D.; Meijer, G.; Helden, G. v.; Seeberger, P. H.; Pagel, K.: Unravelling the structure of glycosyl cations via cold-ion infrared spectroscopy. Nature Communications 9, 4174 (2018)
48.
Journal Article
Thomas, D.; Marianski, M.; Mucha, E.; Meijer, G.; Johnson, M. A.; Helden, G. v.: Ground‐State Structure of the Proton‐Bound Formate Dimer by Cold‐Ion Infrared Action Spectroscopy. Angewandte Chemie International Edition 57 (33), pp. 10615 - 10619 (2018)
49.
Journal Article
Thomas, D.; Marianski, M.; Mucha, E.; Meijer, G.; Johnson, M. A.; Helden, G. v.: Ground‐State Structure of the Proton‐Bound Formate Dimer by Cold‐Ion Infrared Action Spectroscopy. Angewandte Chemie 130 (33), pp. 10775 - 10779 (2018)
50.
Journal Article
Scutelnic, V.; Perez, M. A. S.; Marianski, M.; Warnke, S.; Gregor, A.; Rothlisberger, U.; Bowers, M. T.; Baldauf, C.; Helden, G. v.; Rizzo, T. R. et al.; Seo, J.: The Structure of the Protonated Serine Octamer. Journal of the American Chemical Society 140 (24), pp. 7554 - 7560 (2018)
51.
Journal Article
Mucha, E.; Lettow, M.; Marianski, M.; Thomas, D.; Struwe, W. B.; Harvey, D. J.; Meijer, G.; Seeberger, P. H.; Helden, G. v.; Pagel, K.: Fucose Migration in Intact Protonated Glycan Ions: A Universal Phenomenon in Mass Spectrometry. Angewandte Chemie International Edition 57 (25), pp. 7440 - 7443 (2018)
52.
Journal Article
Mucha, E.; Lettow, M.; Marianski, M.; Thomas, D.; Struwe, W. B.; Harvey, D. J.; Meijer, G.; Seeberger, P. H.; Helden, G. v.; Pagel, K.: Fucose‐Migration in intakten protonierten Glykan‐Ionen – ein universelles Phänomen in der Massenspektrometrie. Angewandte Chemie 130 (25), pp. 7562 - 7565 (2018)
53.
Journal Article
Seo, J.; Hoffmann, W.; Malerz, S.; Warnke, S.; Bowers, M. T.; Pagel, K.; Helden, G. v.: Side-chain effects on the structures of protonated amino acid dimers: A gas-phase infrared spectroscopy study. International Journal of Mass Spectrometry 429, pp. 115 - 120 (2018)
54.
Journal Article
Thomas, D.; Mucha, E.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.: Vibrational Spectroscopy of Fluoroformate, FCO2-, Trapped in Helium Nanodroplets. The Journal of Physical Chemistry Letters 9 (9), pp. 2305 - 2310 (2018)
55.
Journal Article
Hoffmann, W.; Folmert, K.; Moschner, J.; Huang, X.; von Berlepsch, H.; Koksch, B.; Bowers, M. T.; Helden, G. v.; Pagel, K.: NFGAIL Amyloid Oligomers: The Onset of Beta-Sheet Formation and the Mechanism for Fibril Formation. Journal of the American Chemical Society 140 (1), pp. 244 - 249 (2018)
56.
Journal Article
Seo, J.; Warnke, S.; Pagel, K.; Bowers, M. T.; Helden, G. v.: Infrared spectrum and structure of the homochiral serine octamer-dichloride complex. Nature Chemistry 9, pp. 1263 - 1268 (2017)
57.
Journal Article
Hoffmann, W.; Helden, G. v.; Pagel, K.: Ion mobility-mass spectrometry and orthogonal gas-phase techniques to study amyloid formation and inhibition. Current Opinion in Structural Biology 46, pp. 7 - 15 (2017)
58.
Journal Article
Mucha, E.; Gonzalez Florez, A. I.; Marianski, M.; Thomas, D.; Hoffmann, W.; Struwe, W. B.; Hahm, H. S.; Gewinner, S.; Schöllkopf, W.; Seeberger, P. H. et al.; Helden, G. v.; Pagel, K.: Glycan Fingerprinting via Cold-Ion Infrared Spectroscopy. Angewandte Chemie International Edition 56 (37), pp. 11248 - 11251 (2017)
59.
Journal Article
Mucha, E.; Gonzalez Florez, A. I.; Marianski, M.; Thomas, D.; Hoffmann, W.; Struwe, W. B.; Hahm, H. S.; Gewinner, S.; Schöllkopf, W.; Seeberger, P. H. et al.; Helden, G. v.; Pagel, K.: Fingerabdrücke für Glykane durch Spektroskopie kalter Ionen. Angewandte Chemie 129 (37), pp. 11400 - 11404 (2017)
60.
Journal Article
Warnke, S.; Hoffmann, W.; Seo, J.; Genst, E. D.; Helden, G. v.; Pagel, K.: From Compact to String—The Role of Secondary and Tertiary Structure in Charge-Induced Unzipping of Gas-Phase Proteins. Journal of the American Society for Mass Spectrometry 28 (4), pp. 638 - 646 (2017)
61.
Journal Article
Seo, J.; Hoffmann, W.; Warnke, S.; Huang, X.; Gewinner, S.; Schöllkopf, W.; Bowers, M. T.; Helden, G. v.; Pagel, K.: An infrared spectroscopy approach to follow β-sheet formation in peptide amyloid assemblies. Nature Chemistry 9 (1), pp. 39 - 44 (2017)
62.
Journal Article
Seo, J.; Jang, J.; Warnke, S.; Gewinner, S.; Schöllkopf, W.; Helden, G. v.: Stacking Geometries of Early Protoporphyrin IX Aggregates Revealed by Gas-Phase Infrared Spectroscopy. Journal of the American Chemical Society 138 (50), pp. 16315 - 16321 (2016)
63.
Journal Article
Seo, J.; Hoffmann, W.; Warnke, S.; Bowers, M. T.; Pagel, K.; Helden, G. v.: Retention of Native Protein Structures in the Absence of Solvent: A Coupled Ion Mobility and Spectroscopic Study. Angewandte Chemie International Edition 55 (45), pp. 14173 - 14176 (2016)
64.
Journal Article
Seo, J.; Hoffmann, W.; Warnke, S.; Bowers, M. T.; Pagel, K.; Helden, G. v.: Die Erhaltung nativer Proteinstrukturen unter Ausschluss von Lösungsmittel: eine Untersuchung mit Hilfe der Kombination von Ionenmobilität mit Spektroskopie. Angewandte Chemie 128 (45), pp. 14380 - 14384 (2016)
65.
Journal Article
Göth, M.; Lermyte, F.; Schmitt, X. J.; Warnke, S.; Helden, G. v.; Sobott, F.; Pagel, K.: Gas-phase microsolvation of ubiquitin: investigation of crown ether complexation sites using ion mobility-mass spectrometry. Analyst 141 (19), pp. 5502 - 5510 (2016)
66.
Journal Article
Seo, J.; Warnke, S.; Gewinner, S.; Schöllkopf, W.; Bowers, M. T.; Pagel, K.; Helden, G. v.: The impact of environment and resonance effects on the site of protonation of aminobenzoic acid derivatives. Physical Chemistry Chemical Physics 18 (36), pp. 25474 - 25482 (2016)
67.
Journal Article
Kölbel, K.; Warnke, S.; Seo, J.; Helden, G. v.; Moretti, R.; Meiler, J.; Pagel, K.; Sinz, A.: Conformational Shift of a β-Hairpin Peptide upon Complex Formation with an Oligo–proline Peptide Studied by Mass Spectrometry. ChemistrySelect 1 (13), pp. 3651 - 3656 (2016)
68.
Journal Article
Hoffmann, W.; Marianski, M.; Warnke, S.; Seo, J.; Baldauf, C.; Helden, G. v.; Pagel, K.: Assessing the stability of alanine-based helices by conformer-selective IR spectroscopy. Physical Chemistry Chemical Physics 18 (29), pp. 19950 - 19954 (2016)
69.
Journal Article
Gonzalez Florez, A. I.; Mucha, E.; Ahn, D.-S.; Gewinner, S.; Schöllkopf, W.; Pagel, K.; Helden, G. v.: Charge-induced unzipping of isolated proteins to a defined secondary structure. Angewandte Chemie International Edition 55 (10), pp. 3295 - 3299 (2016)
70.
Journal Article
Gonzalez Florez, A. I.; Mucha, E.; Ahn, D.-S.; Gewinner, S.; Schöllkopf, W.; Pagel, K.; Helden, G. v.: Charge-induced unzipping of isolated proteins to a defined secondary structure. Angewandte Chemie 128 (10), pp. 3356 - 3360 (2016)
71.
Journal Article
Helden, G. v.; Schöllkopf, W.; Pagel, K.: Strukturen von Peptidaggregaten erforscht mit dem neuen Freie-Elektronen-Laser des Fritz-Haber-Instituts. Jahrbuch / Max-Planck-Gesellschaft, 9950614 (2016)
72.
Journal Article
Gonzalez Florez, A. I.; Ahn, D.-S.; Gewinner, S.; Schöllkopf, W.; Helden, G. v.: IR spectroscopy of protonated leu-enkephalin and its 18-crown-6 complex embedded in helium droplets. Physical Chemistry Chemical Physics 17 (34), pp. 21902 - 21911 (2015)
73.
Journal Article
Warnke, S.; Helden, G. v.; Pagel, K.: Analyzing the higher order structure of proteins with conformer-selective ultraviolet photodissociation. Proteomics 15 (16), pp. 2804 - 2812 (2015)
74.
Journal Article
Urner, L. H.; Thota, B. N. S.; Nachtigall, O.; Warnke, S.; Helden, G. v.; Haag, R.; Pagel, K.: Online monitoring the isomerization of an azobenzene-based dendritic bolaamphiphile using ion mobility-mass spectrometry. Chemical Communications 51 (42), pp. 8801 - 8804 (2015)
75.
Journal Article
Warnke, S.; Seo, J.; Boschmans, J.; Sobott, F.; Scrivens, J. H.; Bleiholder, C.; Bowers, M. T.; Gewinner, S.; Schöllkopf, W.; Pagel, K. et al.; Helden, G. v.: Protomers of Benzocaine: Solvent and Permittivity Dependence. Journal of the American Chemical Society 137 (12), pp. 4236 - 4242 (2015)
76.
Journal Article
Schubert, F.; Rossi, M.; Baldauf, C.; Pagel, K.; Warnke, S.; Helden, G. v.; Filsinger, F.; Kupser, P.; Meijer, G.; Salwiczek, M. et al.; Koksch, B.; Scheffler, M.; Blum, V.: Exploring the conformational preferences of 20-residue peptides in isolation: Ac-Ala19-Lys + H+ vs. Ac-Lys-Ala19 + H+ and the current reach of DFT. Physical Chemistry Chemical Physics 17 (11), pp. 7373 - 7385 (2015)
77.
Journal Article
Schubert, F.; Pagel, K.; Rossi, M.; Warnke, S.; Salwiczek, M.; Koksch, B.; Helden, G. v.; Blum, V.; Baldauf, C.; Scheffler, M.: Native like helices in a specially designed β peptide in the gas phase. Physical Chemistry Chemical Physics 17 (7), pp. 5376 - 5385 (2015)
78.
Journal Article
Warnke, S.; Baldauf, C.; Bowers, M. T.; Pagel, K.; Helden, G. v.: Photodissociation of Conformer-Selected Ubiquitin Ions Reveals Site-Specific Cis/Trans Isomerization of Proline Peptide Bonds. Journal of the American Chemical Society 136 (29), pp. 10308 - 10314 (2014)
79.
Journal Article
Schnell, M.; Bunker, P.; Helden, G. v.; Grabow, J.-U.; Meijer, G.; van der Avoird, A.: Stark Effect in the Benzene Dimer. The Journal of Physical Chemistry A 117 (50), pp. 13775 - 13778 (2013)
80.
Journal Article
Baldauf, C.; Pagel, K.; Warnke, S.; Helden, G. v.; Koksch, B.; Blum, V.; Scheffler, M.: How Cations Change Peptide Structure. Chemistry-a European Journal 19 (34), pp. 11224 - 11234 (2013)
81.
Journal Article
Schnell, M.; Erlekam, U.; Bunker, P.; Helden, G. v.; Grabow, J.-U.; Meijer, G.; Avoird, A. v. d.: Unraveling the internal dynamics of the benzene dimer: a combined theoretical and microwave spectroscopy study. Physical Chemistry Chemical Physics 15 (25), pp. 10207 - 10223 (2013)
82.
Journal Article
Schnell, M.; Erlekam, U.; Bunker, P.; Helden, G. v.; Grabow, J.-U.; Meijer, G.; Avoird, A. v. d.: Structure of the Benzene Dimer - Governed by Dynamics. Angewandte Chemie International Edition 52 (19), pp. 5180 - 5183 (2013)
83.
Journal Article
Schnell, M.; Erlekam, U.; Bunker, P.; Helden, G. v.; Grabow, J.-U.; Meijer, G.; Avoird, A. v. d.: Die Struktur des Benzoldimers – die Dynamik gewinnt. Angewandte Chemie 125 (19), pp. 5288 - 5292 (2013)
84.
Journal Article
Warnke, S.; Helden, G. v.; Pagel, K.: Communication: Protein Structure in the Gas Phase: The Influence of Side-Chain Microsolvation. Journal of the American Chemical Society 135 (4), pp. 1177 - 1180 (2013)
85.
Journal Article
Filsinger, F.; Ahn, D.-S.; Meijer, G.; Helden, G. v.: Photoexcitation of mass/charge selected hemin⁺, caught in helium nanodroplets. Physical Chemistry Chemical Physics 14 (38), pp. 13370 - 13377 (2012)
86.
Journal Article
Bierau, F.; Kupser, P.; Meijer, G.; Helden, G. v.: Catching proteins in liquid helium droplets. Physical Review Letters 105 (13), 133402 (2010)
87.
Journal Article
Kirilyuk, A.; Fielicke, A.; Demyk, K.; Helden, G. v.; Meijer, G.; Rasing, T.: Ferrimagnetic cagelike Fe₄O₆ cluster: Structure determination from infrared dissociation spectroscopy. Physical Review B, Rapid Comm. 82 (2), pp. 020405 -1 - 020405 -4 (2010)
88.
Journal Article
Rijs, A. M.; Ohanessian, G.; Oomens, J.; Meijer, G.; Helden, G. v.; Compagnon, I.: Internal Proton Transfer Leading to Stable Zwitterionic Structures in a Neutral Isolated Peptide. Angewandte Chemie 122 (13), pp. 2382 - 2385 (2010)
89.
Journal Article
Rijs, A. M.; Ohanessian, G.; Oomens, J.; Meijer, G.; Helden, G. v.; Compagnon, I.: Internal proton transfer leading to stable zwitterionic structures in a neutral isolated peptide. Angewandte Chemie International Edition 49 (13), pp. 2332 - 2335 (2010)
90.
Journal Article
Zhu, H.; Blom, M.; Compagnon, I.; Rijs, A. M.; Roy, S.; Helden, G. v.; Schmidt, B.: Conformations and vibrational spectra of a model tripeptide: change of secondary structure upon micro-solvation. Physical Chemistry Chemical Physics 12, pp. 3415 - 3425 (2010)
91.
Journal Article
Bakker, J. M.; Lapoutre, V. J.F.; Redlich, B.; Oomens, J.; Sartakov, B. G.; Fielicke, A.; Helden, G. v.; Meijer, G.; Meer, A. F. G. v. d.: Intensity-resolved IR multiple photon ionization and fragmentation of C₆₀. The Journal of Chemical Physics 132 (7), 074305 (2010)
92.
Journal Article
Kupser, P.; Pagel, K.; Oomens, J.; Polfer, N. C.; Koksch, B.; Meijer, G.; Helden, G. v.: Amide-I and -II Vibrations of the Cyclic β-Sheet Model Peptide Gramicidin S in the Gas Phase. Journal of the American Chemical Society 132 (6), pp. 2085 - 2093 (2010)
93.
Journal Article
Avoird, A. v. d.; Podeszwa, R.; Szalewicz, K.; Leforestier, C.; Harrevelt, R. v.; Bunker, P.; Schnell, M.; Helden, G. v.; Meijer, G.: Vibration–rotation-tunneling states of the benzene dimer: an ab initio study. Physical Chemistry Chemical Physics 12 (29), pp. 8219 - 8240 (2010)
94.
Journal Article
Rossi, M.; Blum, V.; Kupser, P.; Helden, G. v.; Bierau, F.; Pagel, K.; Meijer, G.; Scheffler, M.: Secondary Structure of Ac-Alan-LysH+ Polyalanine Peptides (n = 5,10,15) in Vacuo: Helical or Not? The Journal of Physical Chemistry Letters 1 (24), pp. 3465 - 3470 (2010)
95.
Journal Article
Pagel, K.; Kupser, P.; Bierau, F.; Polfer, N. C.; Steill, J. D.; Oomens, J.; Meijer, G.; Koksch, B.; Helden, G. v.: Gas-phase IR spectra of intact alpha-helical coiled coil protein complexes. International Journal of Mass Spectrometry 283 (1-3), pp. 161 - 168 (2009)
96.
Journal Article
Kupser, P.; Steill, J. D.; Oomens, J.; Meijer, G.; Helden, G. v.: IR spectroscopy of gas-phase C₆₀⁻. Physical Chemistry Chemical Physics 10 (45), pp. 6862 - 6866 (2008)
97.
Journal Article
Filsinger, F.; Erlekam, U.; Helden, G. v.; Küpper, J.; Meijer, G.: Selector for structural isomers of neutral molecules. Physical Review Letters 100 (13), 133003 (2008)
98.
Journal Article
Helden, G. v.; Compagnon, I.; Blom, M.; Frankowski, M.; Erlekam, U.; Oomens, J.; Brauer, B.; Gerber, R. B.; Meijer, G.: Mid-IR spectra of different conformers of phenylalanine in the gas phase. Physical Chemistry Chemical Physics 10 (9), pp. 1248 - 1256 (2008)
99.
Journal Article
Abo-Riziq, A.; Crews, B. O.; Compagnon, I.; Oomens, J.; Meijer, G.; Helden, G. v.; Kabelác, M.; Hobza, P.; de Vries, M. S.: The Mid-IR Spectra of 9-Ethyl Guanine, Guanosine, and 2-Deoxyguanosine. Journal of Physical Chemistry A 111 (31), pp. 7529 - 7536 (2007)
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Safferthal, M.; Greis, K.; Chang, R.; Chang, C.-W.; Hoffmann, W.; Meijer, G.; Helden, G. v.; Pagel, K.: The impact of side-chain fluorination on proton-bound phenylalanine dimers: a cryogenic infrared spectroscopic study. Physical Chemistry Chemical Physics 26 (44), pp. 28155 - 28160 (2024)
Jara-Toro, R. A.; Taccone, M. I.; Dezalay, J.; Noble, J. A.; Helden, G. v.; Pino, G. A.: Observation of a core-excited dipole-bound state ∼1 eV above the electron detachment threshold in cryogenically cooled acetylacetonate. The Journal of Chemical Physics 161 (8), 084305 (2024)
Kirschbaum, C.; Greis, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.; Urner, L. H.: Structure and Conformation Determine Gas-Phase Infrared Spectra of Detergents. ChemPlusChem 89 (10), e202400340 (2024)
Kirschbaum, C.; Greis, K.; Torres-Boy, A. Y.; Riedel, J.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Studying the Intrinsic Reactivity of Chromanes by Gas-Phase Infrared Spectroscopy. Journal of the American Society for Mass Spectrometry 35 (8), pp. 1950 - 1958 (2024)
Meijer, G.; Helden, G. v.: Metal Monoxide Abundances as a Function of the C/O Ratio. ACS Earth and Space Chemistry 8 (9), pp. 1690 - 1692 (2024)
Torres-Boy, A. Y.; Taccone, M.; Kirschbaum, C.; Ober, K.; Stein, T.; Meijer, G.; Helden, G. v.: Investigation of the Proton-Bound Dimer of Dihydrogen Phosphate and Formate Using Infrared Spectroscopy in Helium Droplets. The Journal of Physical Chemistry A (2024)
Greis, K.; Kirschbaum, C.; Ober, K.; Taccone, M.; Torres-Boy, A. Y.; Meijer, G.; Pagel, K.; Helden, G. v.: Infrared Spectroscopy of Fluorenyl Cations at Cryogenic Temperatures. The Journal of Physical Chemistry Letters 14 (50), pp. 11313 - 11317 (2023)
Chang, C.-W.; Greis, K.; Prabhu, G. R. D.; Wehner, D.; Kirschbaum, C.; Ober, K.; Torres-Boy, A. Y.; Leichnitz, S.; Meijer, G.; von Helden, G. et al.; Seeberger, P. H.; Pagel, K.: Mechanistic insight into benzylidene-directed glycosylation reactions using cryogenic infrared spectroscopy. Nature Synthesis 3 (2024)
Safferthal, M.; Greis, K.; Chang, R.; Kirschbaum, C.; Hoffmann, W.; Meijer, G.; Helden, G. v.; Pagel, K.: Cryogenic infrared spectroscopy reveals remarkably short NH+⋯F hydrogen bonds in fluorinated phenylalanines. Physical Chemistry Chemical Physics 25 (36), pp. 24783 - 24788 (2023)
Greis, K.; Griesbach, C. E.; Kirschbaum, C.; Meijer, G.; Helden, G. v.; Pagel, K.; Peczuh, M. W.: Characterization and Fate of a Septanosyl Ferrier Cation in the Gas and Solution Phases. The Journal of Organic Chemistry 88 (9), pp. 5543 - 5553 (2023)
Lettow, M.; Greis, K.; Mucha, E.; Lambeth, T. R.; Yaman, M.; Kontodimas, V.; Manz, C.; Hoffmann, W.; Meijer, G.; Julian, R. R. et al.; Helden, G. v.; Marianski, M. R.; Pagel, K.: Decoding the Fucose Migration Product during Mass-Spectrometric Analysis of Blood Group Epitopes. Angewandte Chemie International Edition 62 (24), e202302883 (2023)
Riedel, J.; Lettow, M.; Grabarics, M.; Götze, M.; Miller, R. L.; Boons, G.-J.; Meijer, G.; Helden, G. v.; Szekeres, G. P.; Pagel, K.: Predicting Structural Motifs of Glycosaminoglycans using Cryogenic Infrared Spectroscopy and Random Forest. Journal of the American Chemical Society 145 (14), pp. 7859 - 7868 (2023)
Taccone, M.; Thomas, D.; Ober, K.; Gewinner, S.; Schöllkopf, W.; Meijer, G.; Helden, G. v.: Infrared action spectroscopy of the deprotonated formic acid trimer, trapped in helium nanodroplets. Physical Chemistry Chemical Physics 25 (15), pp. 10907 - 10916 (2023)

C. Kirschbaum, R. S. E. Young, K. Greis, J. P. Menzel, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, T. Causon, V. R. Narreddula, B. L. J. Poad, S. J. Blanksby, and K. Pagel
Establishing Carbon-Carbon Double Bond Position and Configuration in Unsaturated Fatty Acids by Gas-Phase Infrared Spectroscopy
Chem. Sci., 14, 2518-2527 (2023)
http://dx.doi.org/10.1039/d2sc06487a

K. Greis, S. Leichnitz, C. Kirschbaum, C. W. Chang, M. H. Lin, G. Meijer, G. von Helden, P. H. Seeberger, and K. Pagel
The Influence of the Electron Density in Acyl Protecting Groups on the Selectivity of Galactose Formation
J. Am. Chem. Soc., 144, 20258-20266 (2022)
http://dx.doi.org/10.1021/jacs.2c05859

E. Mucha, D. Thomas, M. Lettow, G. Meijer, K. Pagel, and G. von Helden
Spectroscopy of Small and Large Biomolecular Ions in Helium-Nanodroplets
in: Molecules in Superfluid Helium Nanodroplets, edited by A. Slenczka and J. P. Toennies
Topics in Applied Physics, Volume 145 (2022)
http://dx.doi.org/10.1007/978-3-030-94896-2_6

K. Greis, C. Kirschbaum, G. Fittolani, E. Mucha, R. Chang, G. von Helden, G. Meijer, M. Delbianco, P. H. Seeberger, and K. Pagel
Neighboring Group Participation of Benzoyl Protecting Groups in C3- and C6-Fluorinated Glucose
Eur. J. Org. Chem., e202200255 (2022)
http://dx.doi.org/10.1002/ejoc.202200255

K. Greis, C. Kirschbaum, M. I. Taccone, M. Götze, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, and K. Pagel
Studying the Key Intermediate of RNA Autohydrolysis by Cryogenic Gas-Phase Infrared Spectroscopy
Angew. Chem. Int. Ed., 61, e202115481 (2022)
http://dx.doi.org/10.1002/anie.202115481

C. Kirschbaum, K. Greis, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, and K. Pagel
Cryogenic infrared spectroscopy provides mechanistic insight into the fragmentation of phospholipid silver adducts
Anal. Bioanal. Chem., 414, 5275-5285 (2022)
http://dx.doi.org/10.1007/s00216-022-03927-6

K. Greis, C. Kirschbaum, G. von Helden, and K. Pagel
Gas-phase infrared spectroscopy of glycans and glycoconjugates
Curr. Opin. Struct. Biol., 72, 194-202 (2022)
http://dx.doi.org/10.1016/j.sbi.2021.11.006

D. A. Thomas, M. Taccone, K. Ober, E. Mucha, G. Meijer, and G. von Helden
Helium Nanodroplet Infrared Action Spectroscopy of the Proton-Bound Dimer of Hydrogen Sulfate and Formate: Examining Nuclear Quantum Effects
 J. Phys. Chem. A, 125, 9279–9287 (2021)
http://dx.doi.org/10.1021/acs.jpca.1c05705

C. Kirschbaum, K. Greis, L. Polewski, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, and K. Pagel
Unveiling Glycerolipid Fragmentation by Cryogenic Infrared Spectroscopy
J. Am. Chem. Soc., 143, 14827-14834 (2021)
http://dx.doi.org/10.1021/jacs.1c06944

M. Lettow, K. Greis, M. Grabarics, J. Horlebein, R. L. Miller, G. Meijer, G. von Helden, and K. Pagel
Chondroitin Sulfate Disaccharides in the Gas Phase: Differentiation and Conformational Constraints
J. Phys. Chem. A, 125, 4373-4379 (2021)
http://dx.doi.org/10.1021/acs.jpca.1c02463

C. Kirschbaum, K. Greis, M. Lettow, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, and K. Pagel
Non-covalent double bond sensors for gas-phase infrared spectroscopy of unsaturated fatty acids
Anal. Bioanal. Chem., 413, 3643-3653 (2021)
http://dx.doi.org/10.1007/s00216-021-03334-3

C. Kirschbaum, K. Greis, E. Mucha, L. Kain, S. Deng, A. Zappe, S. Gewinner, W. Schöllkopf, G. von Helden, G. Meijer, P. B. Savage, M. Marianski, L. Teyton, and K. Pagel
Unravelling the structural complexity of glycolipids with cryogenic infrared spectroscopy
Nat. Commun., 12, 1201 (2021)
http://dx.doi.org/10.1038/s41467-021-21480-1

K. Greis, C. Kirschbaum, S. Leichnitz, S. Gewinner, W. Schöllkopf, G. von Helden, G. Meijer, P. H. Seeberger, and K. Pagel
Direct Experimental Characterization of the Ferrier Glycosyl Cation in the Gas Phase
Org. Lett., 22, 8916-8919 (2020)
http://dx.doi.org/10.1021/acs.orglett.0c03301

D. A. Thomas, R. Chang, E. Mucha, M. Lettow, K. Greis, S. Gewinner, W. Schöllkopf, G. Meijer, and G. von Helden
Probing the conformational landscape and thermochemistry of DNA dinucleotide anions via helium nanodroplet infrared action spectroscopy
Phys. Chem. Chem. Phys., 22, 18400-18413 (2020)
http://dx.doi.org/10.1039/D0CP02482A

M. Lettow, M. Grabarics, K. Greis, E. Mucha, D. A. Thomas, P. Chopra, G.-J. Boons, R. Karlsson, J. E. Turnbull, G. Meijer, R. L. Miller, G. von Helden, and K. Pagel
Cryogenic Infrared Spectroscopy Reveals Structural Modularity in the Vibrational Fingerprints of Heparan Sulfate Diastereomers
Anal. Chem., 92, 10228-10232 (2020)
http://dx.doi.org/10.1021/acs.analchem.0c02048

K. Greis, E. Mucha, M. Lettow, D. A. Thomas, C. Kirschbaum, S. Moon, A. Pardo-Vargas, G. von Helden, G. Meijer, K. Gilmore, P. H. Seeberger, and K. Pagel
The Impact of Leaving Group Anomericity on the Structure of Glycosyl Cations of Protected Galactosides
ChemPhysChem, 21, 1905-1907 (2020)
http://dx.doi.org/10.1002/cphc.202000473

C. Kirschbaum, E. M. Saied, K. Greis, E. Mucha, S. Gewinner, W. Schöllkopf, G. Meijer, G. von Helden, B. L. J. Poad, S. J. Blanksby, C. Arenz, and K. Pagel
Resolving Sphingolipid Isomers using Cryogenic Infrared Spectroscopy
Angew. Chem., Int. Ed., 59, 13638-13642 (2020)
http://dx.doi.org/10.1002/anie.202002459

M. Marianski, E. Mucha, K. Greis, S. Moon, A. Pardo, C. Kirschbaum, D. A. Thomas, G. Meijer, G. von Helden, K. Gilmore, P. H. Seeberger, and K. Pagel
Remote Participation during Glycosylation Reactions of Galactose Building Blocks: Direct Evidence from Cryogenic Vibrational Spectroscopy
Angew. Chem., Int. Ed., 59, 6166-6171 (2020)
http://dx.doi.org/10.1002/anie.201916245

M. Lettow, M. Grabarics, E. Mucha, L. Polewski, J. Freyse, J. Rademann, G. Meijer, G. von Helden, and K. Pagel
IR action spectroscopy of glycosaminoglycan oligosaccharides
Anal. Bioanal. Chem., 412, 533–537 (2020)
http://dx.doi.org/10.1007/s00216-019-02327-7

W. Hoffmann, J. Langenhan, S. Huhmann, J. Moschner, R. Chang, M. Accorsi, J. Seo, R. Jörg, G. Meijer, B. Koksch, M. T. Bowers, G. von Helden, and K. Pagel
An Intrinsic Hydrophobicity Scale for Amino Acids and Its Application to Fluorinated Compounds
Angew. Chem., Int. Ed., 58, 8216-8220 (2019)
http://dx.doi.org/10.1002/anie.201813954

D. A. Thomas, E. Mucha, M. Lettow, C. Mainz, G. Meijer, M. Rossi, and G. von Helden
Characterization of a trans–trans Carbonic Acid–Fluoride Complex by Infrared Action Spectroscopy in Helium Nanodroplets
J. Am. Chem. Soc., 141, 5815–5823 (2019)
http://dx.doi.org/10.1021/jacs.8b13542

M. Lettow, E. Mucha, C. Mainz, D. A. Thomas, M. Marianski, G. Meijer, G. von Helden, and K. Pagel
The role of the mobile proton in fucose migration
Anal. Bioanal. Chem., 411, 4637–4645 (2019)
http://dx.doi.org/10.1007/s00216-019-01657-w

E. Mucha, M. Marianski, F.-F. Xu, D. A. Thomas, G. Meijer, G. von Helden, P. H. Seeberger, and K. Pagel
Unravelling the structure of glycosyl cations via cold-ion infrared spectroscopy
Nat. Commun., 9, 4174 (2018)
http://dx.doi.org/10.1038/s41467-018-06764-3

M. Marianski, J. Seo, E. Mucha, D. A. Thomas, S. Jung, R. Schlögl, G. Meijer, A. Trunschke, and G. von Helden
Structural Characterization of Molybdenum Oxide Nanoclusters Using Ion Mobility Spectrometry–Mass Spectrometry and Infrared Action Spectroscopy
J. Phys. Chem. C, 123, 7845–7853 (2019)
http://dx.doi.org/10.1021/acs.jpcc.8b06985

D. A. Thomas, M. Marianski, E. Mucha, G. Meijer, M. A. Johnson, and G. von Helden
Ground‐State Structure of the Proton‐Bound Formate Dimer by Cold‐Ion Infrared Action Spectroscopy
Angew. Chem., Int. Ed., 57, 10615-10619 (2018)
http://dx.doi.org/10.1002/anie.201805436

E. Mucha, M. Lettow, M. Marianski, D. A. Thomas, W. B. Struwe, D. J. Harvey, G. Meijer, P. H. Seeberger, G. von Helden, and K. Pagel
Fucose Migration in Intact Protonated Glycan Ions - A Universal Phenomenon in Mass Spectrometry
Angew. Chem., Int. Ed., 57, 7440-7443 (2018)
http://dx.doi.org/10.1002/anie.201801418

D. A. Thomas, E. Mucha, S. Gewinner, W. Schöllkopf, G. Meijer, and G. von Helden
Vibrational Spectroscopy of Fluoroformate, FCO2, Trapped in Helium Nanodroplets
J. Phys. Chem. Lett., 9, 2305-2310 (2018)
http://dx.doi.org/10.1021/acs.jpclett.8b00664

V. Scutelnic, M. A. S. Perez, M. Marianski, S. Warnke, A. Gregor, U. Rothlisberger, M. T. Bowers, C. Baldauf, G. von Helden, T. R. Rizzo, and J. Seo
The Structure of the Protonated Serine Octamer
J. Am. Chem. Soc., 140, 7554-7560 (2018)
http://dx.doi.org/10.1021/jacs.8b02118
(Spotlight J. Am. Chem. Soc. 140, 7371-7372 (2018) http://dx.doi.org/10.1021/jacs.8b05773)

J. Seo, W. Hoffmann, S. Malerz, S. Warnke, M. T. Bowers, K. Pagel and G. von Helden
Side-chain effects on the structures of protonated amino acid dimers: A gas-phase infrared spectroscopy study
Int. J. Mass Spectrom., 429, 115-120 (2018)
http://dx.doi.org/10.1016/j.ijms.2017.06.011

W. Hoffmann, K. Folmert, J. Moschner, X. Huang, H. von Berlepsch, B. Koksch, M. T. Bowers, G. von Helden, and K. Pagel
NFGAIL Amyloid Oligomers: The Onset of Beta-Sheet Formation and the Mechanism for Fibril Formation
J. Am. Chem. Soc., 140, 244–249 (2018)
http://dx.doi.org/10.1021/jacs.7b09510

W. Hoffmann and K. Pagel
Von normalen Proteinen zu unlöslichen Ablagerungen
Nach. Chem., 65, 874–878 (2017)
http://dx.doi.org/10.1002/nadc.20174058651

J. Seo, S. Warnke, K. Pagel, M. T. Bowers, and G. von Helden
Infrared spectrum and structure of the homochiral serine octamer–dichloride complex
Nat. Chem., 9, 1263–1268 (2017)
http://dx.doi.org/10.1038/nchem.2821

E. Mucha, A. I. González Flórez, M. Marianski, D. A. Thomas, W. Hoffmann, W. B. Struwe, H. S. Hahm, S. Gewinner, W. Schöllkopf, P. H. Seeberger, G. von Helden and K. Pagel
Glycan Fingerprinting via Cold-Ion Infrared Spectroscopy
Ang. Chem. Int. Ed., 56, 11248–11251 (2017)
http://dx.doi.org/10.1002/anie.201702896
http://dx.doi.org/10.1002/ange.201702896 (German Version)

J. Hofmann and K. Pagel
Glycan Analysis by Ion Mobility-Mass Spectrometry
Ang. Chem. Int. Ed., 56, 8342–8349 (2017)
http://dx.doi.org/10.1002/anie.201701309
http://dx.doi.org/10.1002/anie.201701309 (German Version)

H. S. Hahm, M. Schlegel, M. Hurevich, S. Eller, F. Schuhmacher, J. Hofmann, K. Pagel and P. H. Seeberger
Automated glycan assembly using the Glyconeer 2.1 synthesizer
Proc. Natl. Acad. Sci. U.S.A., 114, E3385-E3389 (2017)
http://dx.doi.org/10.1073/pnas.1700141114

W. Hoffmann, G. von Helden, and K. Pagel
Ion mobility-mass spectrometry and orthogonal gas-phase techniques to study amyloid formation and inhibition
Curr. Opin. Struct. Biol., 46, 7-15 (2017)
http://dx.doi.org/10.1016/j.sbi.2017.03.002

J. Hofmann, A. Stuckmann, M. Crispin, D. J. Harvey, K. Pagel, and W. B. Struwe
Identification of Lewis and Blood Group Carbohydrate Epitopes by Ion Mobility-Tandem-Mass Spectrometry Fingerprinting
Anal. Chem., 89, 2318-2325 (2017)
http://dx.doi.org/10.1021/acs.analchem.6b03853

S. Warnke, W. Hoffmann, J. Seo, E. De Genst, G. von Helden and K. Pagel
From Compact to String – The Role of Secondary and Tertiary Structure in Charge-Induced Unzipping of Gas-Phase Proteins
J. Am. Soc. Mass Spectrom., 28, 638–646 (2017)
http://dx.doi.org/10.1007/s13361-016-1551-5

J. Seo, W. Hoffmann, S. Warnke, X. Huang, S. Gewinner, W. Schöllkopf, M. T. Bowers, G. von Helden and K. Pagel
An Infrared Spectroscopy Approach to Follow β-Sheet Formation in Peptide Amyloid Assemblies
Nat. Chem., 9, 39-44 (2017)
http://dx.doi.org/10.1038/NCHEM.2615

J. Seo, J. Jang, S. Warnke, S. Gewinner, W. Schöllkopf and G. von Helden
Stacking Geometries of Early Protoporphyrin IX Aggregates Revealed by Gas-Phase Infrared Spectroscopy
J. Am. Chem. Soc., 138, 16315-16321 (2016)
http://dx.doi.org/10.1021/jacs.6b08700

W. B. Struwe, C. Baldauf, J. Hofmann, P. M. Rudd and K. Pagel
Ion Mobility Separation of Deprotonated Oligosaccharide Isomers - Evidence for Gas-Phase Charge Migration
Chem. Commun., 52, 12353-12356 (2016)
http://dx.doi.org/10.1039/C6CC06247D

J. Seo, W. Hoffmann, S. Warnke, M. T. Bowers, K. Pagel, and G. von Helden
Retention of Native Protein Structures in the Absence of Solvent: A Coupled Ion Mobility and Spectroscopic Study
Angew. Chem. Int. Ed., 55, 14173-14176 (2016)
http://dx.doi.org/10.1002/anie.201606029
http://dx.doi.org/10.1002/ange.201606029 (German version)

J. Seo, S. Warnke, S. Gewinner, W. Schöllkopf, M. T. Bowers, K. Pagel, and G. von Helden
The Impact of Environment and Resonance Effects on the Site of Protonation of Aminobenzoic Acid Derivatives
Phys. Chem. Chem. Phys., 18, 25474-25482 (2016).
http://dx.doi.org/10.1039/C6CP04941A

M. Göth, F. Lermyte, X. J. Schmitt, S. Warnke, G. von Helden, F. Sobott, and K. Pagel
Gas-Phase Microsolvation of Ubiquitin: Investigation of Crown Ether Complexation Sites using Ion Mobility-Mass Spectrometry
Analyst, 141, 5465-5466(2016)
http://dx.doi.org/10.1039/C6AN01377E

K. Kölbel, S. Warnke, J. Seo, G. von Helden, R. Moretti, J. Meiler, K. Pagel, and A. Sinz
Conformational Shift of a β-Hairpin Peptide upon Complex Formation with an Oligo–proline Peptide Studied by Mass Spectrometry
ChemistrySelect, 1, 3651–3656 (2016)
http://dx.doi.org/10.1002/slct.201600934

W. Hoffmann, M. Marianski, S. Warnke, J. Seo, C. Baldauf, G. von Helden, K. Pagel
Assessing the Stability of Alanine-Based Helices by Conformer-Selective IR Spectroscopy
Phys. Chem. Chem. Phys., 18, 19950–19954 (2016)
http://dx.doi.org/10.1039/C6CP03827A

K. Pagel, D. Sattler, S. P. Black, S. Warnke, A. R. Stefankiewicz, J. R. Nitschke, G. von Helden, C. A. Schalley
Following the Structural Evolution of Metallo-Supramolecular [7]Catenanes by Ion Mobility-Mass Spectrometry
submitted

K. Nowosinski, S. Warnke, K. Pagel, D. Komáromy, W. Jiang, C. A. Schalley
Photooxygenation and Gas-Phase Reactivity of Multiply Threaded Pseudorotaxanes
J. Mass Spectrom., 51, 269–281 (2016)
http://dx.doi.org/10.1002/jms.3746

H. Hinneburg, J. Hofmann, W. B. Struwe, A. Thader, F. Altmann, D. Varón Silva, P. H. Seeberger, K. Pagel, D. Kolarich
Distinguishing N-Acetylneuraminic Acid Linkage Isomers on Glycopeptides by Ion Mobility-Mass Spectrometry
Chem. Commun., 52, 4381-4384 (2016).
http://dx.doi.org/10.1039/C6CC01114D

A. I. González Flórez, E. Mucha, D.-S. Ahn, S. Gewinner, W. Schöllkopf, K. Pagel, G. von Helden
Charge-induced Unzipping of Isolated Proteins to a Defined Secondary Structure
Angew. Chem. Int. Ed., 55, 3295–3299 (2016).
http://dx.doi.org/10.1002/anie.201510983
http://dx.doi.org/10.1002/ange.201510983 (German version)

J. Hofmann, H. S. Hahm, P. H. Seeberger and K. Pagel
Identification of Carbohydrate Anomers Using Ion Mobility-Mass Spectrometry
Nature, 526, 241–244 (2015).
http://dx.doi.org/10.1038/nature15388

A. I. González Flórez, D.-S. Ahn, S. Gewinner, W. Schöllkopf and G. von Helden
IR Spectroscopy of Protonated Leu-Enkephalin and its 18-crown-6 Complex Embedded in Helium Droplets
Phys. Chem. Chem. Phys. 17, 21902-21911 (2015).
http://dx.doi.org/10.1039/C5CP02172C

L. Urner, B. Thota, O. Nachtigall, S. Warnke, G. von Helden, R. Haag, K. Pagel
Online Monitoring the Isomerization of an Azobenzene-Based Dendritic Bolaamphiphile Using Ion Mobility-Mass Spectrometry
Chem. Commun. 51, 8801-8804 (2015).
http://dx.doi.org/10.1039/C5CC01488C

S. Warnke, J. Seo, J. Boschmans, F. Sobott, J. H. Scrivens, C. Bleiholder, M. T. Bowers, S. Gewinner, W. Schöllkopf, K. Pagel and G. von Helden
Protomers of Benzocaine: Solvent and Permittivity Dependence
J. Am. Chem. Soc. 137, 4236–4242 (2015).
http://dx.doi.org/10.1021/jacs.5b01338

F. Schubert, M. Rossi, C. Baldauf, K. Pagel, S. Warnke, G. von Helden, F. Filsinger, P. Kupser, G. Meijer, M. Salwiczek, B. Koksch, M. Scheffler and V. Blum
Exploring the conformational preferences of 20-residue peptides in isolation: Ac-Ala19-Lys + H+ vs. Ac-Lys-Ala19 + H+ and the current reach of DFT
Phys. Chem. Chem. Phys. 17, 7373-7385 (2015).
http://dx.doi.org/ 10.1039/C4CP05541A

S. Warnke, G. von Helden, K. Pagel
Analyzing the Higher Order Structure of Proteins with Conformer-Selective Ultraviolet Photodissociation Proteomics
Proteomics 16, 2804–2812 (2015).
http://dx.doi.org/10.1002/pmic.201400480

F. Schubert, K. Pagel, M. Rossi, S. Warnke, M. Salwiczek, B. Koksch, G. von Helden, V. Blum, C. Baldauf and M. Scheffler
Native Like Helices in a Specially Designed beta Peptide in the Gas Phase
Phys. Chem. Chem. Phys. 17, 5376-5385 (2015).
http://dx.doi.org/10.1039/C4CP05216A

J. Hofmann, W. B. Struwe, C. A. Scarff, J. H. Scrivens, D. J. Harvey, K. Pagel
Estimating Collision Cross Sections of Negatively Charged N-Glycans using Travelling Wave Ion Mobility-Mass Spectrometry
Anal. Chem. 86, 10789–10795 (2014).
http://dx.doi.org/10.1021/ac5028353

S. Warnke, C. Baldauf, M. Bowers, K. Pagel, G. von Helden
Photodissociation of Conformer-Selected Ubiquitin Ions Reveals Site-Specific Cis/Trans Isomerization of Proline Peptide Bonds
J. Am. Chem. Soc. 136, 10308–10314 (2014).
http://dx.doi.org/10.1021/ja502994b
(Spotlight J. Am. Chem. Soc. 136, 10173–10173 (2014) http://dx.doi.org/10.1021/ja507050z )

W. Hoffmann, J. Hofmann, K. Pagel
Energy-Resolved Ion Mobility-Mass Spectrometry – A Concept to Improve the Separation of Isomeric Carbohydrates
J. Am. Soc. Mass Spectrom. 25, 471-479 (2014).
http://dx.doi.org/10.1007/s13361-013-0780-0

M. Schnell, P. R. Bunker, G. von Helden, J.-U. Grabow, G. Meijer, A. van der Avoird
Stark Effect in the Benzene Dimer
J. Phys. Chem. A, 117, 13775–13778 (2013).
http://dx.doi.org/10.1021/jp408076q

C. Baldauf, K. Pagel, S. Warnke, G. von Helden, B. Koksch, V. Blum, M. Scheffler
How Cations Change Peptide Structure
Chem. Eur. J. 19, 11224-11234 (2013).
http://dx.doi.org/10.1002/chem.201204554

K. Pagel, D. J. Harvey
Ion Mobility Mass Spectrometry of Complex Carbohydrates - Collision Cross Sections of N-linked Glycans
Anal. Chem. 85, 5138-5145 (2013).
http://dx.doi.org/10.1021/ac400403d

M. Schnell, U. Erlekam, P. R. Bunker, G. von Helden, J. U. Grabow, G. Meijer, A. van der Avoird
Unraveling the internal dynamics of the benzene dimer: a combined theoretical and microwave spectroscopy study
Phys. Chem. Chem. Phys. 15, 10207-10223 (2013).
http://dx.doi.org/10.1039/c3cp51181b

M. Schnell, U. Erlekam, G. von Helden, J.U. Grabow, G. Meijer, A. van der Avoird
Structure of the Benzene Dimer - Governed by Dynamics | Die Struktur des Benzoldimers – die Dynamik gewinnt
Angew. Chem. Int. Ed. 52, 5180-5183 (2013). | Angew. Chem. 125, 5288-5292 (2013).
http://dx.doi.org/10.1002/anie.201300653 | http://dx.doi.org/10.1002/ange.201300653

K. Pagel, E. Natan, Z. Hall, A. R. Fersht, C. V. Robinson
Intrinsically Disordered p53 and its Complexes Populate Compact Conformations in the Gas Phase
Angew. Chem. Intl. Ed. 125, 379-383 (2013).
http://dx.doi.org/10.1002/anie.201203047

S. Warnke, G. von Helden, K. Pagel
Protein structure in the gas phase: The influence of side-chain microsolvation
J. Am. Chem. Soc. 135, 1177-1180 (2013).
http://dx.doi.org/10.1021/ja308528d
(Highlighted in: Nature Chemistry 5, 150 (2013); http://dx.doi.org/10.1038/nchem.1590)

F. Filsinger, D. S. Ahn, G. Meijer, G. von Helden
Photoexcitation of mass/charge selected hemin+, caught in helium nanodroplets
Phys. Chem. Chem. Phys. 14, 13370-13377 (2012).
http://dx.doi.org/10.1039/c2cp42071f

M. Rossi, V. Blum, P. Kupser, G. von Helden, F. Bierau, K. Pagel, G. Meijer, M. Scheffler
Secondary Structure of Ac-Alan-LysH+ Polyalanine Peptides (n=5, 10, 15) in Vacuo: Helical or Not?
J. Phys. Chem. Lett. 1, 3465-3470 (2010).
http://dx.doi.org/10.1021/jz101394u

F. Bierau, P. Kupser, G. Meijer, G. von Helden
Catching proteins in liquid helium droplets
Phys. Rev. Lett. 105 133402 (2010).
http://dx.doi.org/10.1103/PhysRevLett.105.133402

A. van der Avoird, R. Podeszwa, K. Szalewicz, C. Leforestier, R. van Harrevelt, P.R. Bunker, M. Schnell, G. von Helden, G. Meijer
Vibration-rotation-tunneling states of the benzene dimer: An ab initio study
Phys. Chem. Chem. Phys. 12, 8219-8240 (2010).
http://dx.doi.org/10.1039/c002653k

H. Zhu, M. Blom, I. Compagnon, A. M. Rijs, S. Roy, G. von Helden G, B. Schmidt
Conformations and vibrational spectra of a model tripeptide: change of secondary structure upon micro-solvation
Phys. Chem. Chem. Phys. 12, 3415-3425 (2010).
http://dx.doi.org/10.1039/b926413b

A.M. Rijs, G. Ohanessian, J. Oomens, G. Meijer, G. von Helden, I. Compagnon
Internal proton transfer leading to stable zwitterionic structures in a neutral isolated peptide
Angew. Chem. Int. Ed. 49, 2332 –2335 (2010).
http://dx.doi.org/10.1002/anie.200906503

P. Kupser, K. Pagel, J. Oomens, N. Polfer, B. Koksch, G. Meijer, G. von Helden
Amide-I and -II vibrations of the cyclic beta-sheet model peptide Gramicidin S in the gas phase
J. Am. Chem. Soc. 132, 2085-2093 (2010).
http://dx.doi.org/10.1021/ja909842j

J. M. Bakker, V. J. F. Lapoutre, B. Redlich, J. Oomens, B. G. Sartakov, A. Fielicke, G. von Helden, G. Meijer, A.F.G. van der Meer
Intensity-resolved IR multiple photon ionization and fragmentation of C60
J. Chem. Phys. 132, 074305 (2010).
http://dx.doi.org/10.1063/1.3313926

K. Pagel, P. Kupser, F. Bierau, N. C. Polfer, J. D. Steill, J. Oomens, G. Meijer, B. Koksch and G. von Helden
Gas-phase IR spectra of intact alpha-helical coiled coil protein complexes
Int. J. Mass Spectom. Ion Process. 283, 161-168 (2009).
http://dx.doi.org/10.1016/j.ijms.2009.02.026

G. von Helden, I. Compagnon, M. N. Blom, M. Frankowski, U. Erlekam, J. Oomens, B. Brauer, R. B. Gerber and G. Meijer
Mid-IR spectra of different conformers of phenylalanine in the gas phase
Phys. Chem. Chem. Phys. 10, 1248-1256 (2008).
http://dx.doi.org/10.1039/b713274c

P. Kupser, J. D. Steill, J. Oomens, G. Meijer and G. von Helden
IR spectroscopy of gas-phase C60-
Phys. Chem. Chem. Phys. 10, 6862-6866 (2008).
http://dx.doi.org/10.1039/b811862k

F. Filsinger, U. Erlekam, G. von Helden, J. Kupper and G. Meijer
Selector for structural isomers of neutral molecules
Phys. Rev. Lett. 100, 133003 (2008).
http://dx.doi.org/10.1103/PhysRevLett.100.133003

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