Fingerprint IR Spectroscopy to Probe Amino Acid Conformations in the Gas Phase

Joost M. Bakker, Luke Mac Aleese, Gerard Meijer, and Gert von Helden
Phys. Rev. Lett. 91, 203003 – Published 12 November 2003

Abstract

We report the infrared (IR) absorption spectra of different conformational isomers of gas phase amino acid molecules in the molecular fingerprint region of 3301500   cm1. The IR absorption spectra for three conformers of the amino acid tryptophan show absorption bands that uniquely identify the conformational structure of the molecule and that are well matched by density functional theory calculations. The present observations hold great promise for future identification of conformational folding of larger molecules by means of their IR absorption characteristics.

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  • Received 25 June 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.203003

©2003 American Physical Society

Authors & Affiliations

Joost M. Bakker1,*, Luke Mac Aleese1,2, Gerard Meijer1,3,4, and Gert von Helden1

  • 1FOM-Institute for Plasmaphysics Rijnhuizen, Edisonbaan 14, NL-3439 MN Nieuwegein, The Netherlands
  • 2Laboratoire de Chimie Physique (UMR 8000–CNRS), Bâtiment 350, Université Paris XI, 91405 Orsay CEDEX, France
  • 3Department of Molecular and Laser Physics, University of Nijmegen, Toernooiveld, NL-6525 ED Nijmegen, The Netherlands
  • 4Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

  • *Electronic address: jmbakker@rijnh.nl

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Vol. 91, Iss. 20 — 14 November 2003

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