Publications of Gert von Helden

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 31 (7), e202403724 (2025)

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)

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 27 (4), pp. 1990 - 2000 (2025)

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)

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)

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)

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)

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.; 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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)