Gas-phase Infrared Spectroscopy of Monopeptides from 10 to 3 µm

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  • Mitsuhiko Miyazaki
    Chemical Spectroscopy Division, Chemical Resources Laboratory, Tokyo Institute of Technology
  • Koji Makara
    Chemical Spectroscopy Division, Chemical Resources Laboratory, Tokyo Institute of Technology
  • Shun-ichi Ishiuchi
    Chemical Spectroscopy Division, Chemical Resources Laboratory, Tokyo Institute of Technology
  • Masaaki Fujii
    Chemical Spectroscopy Division, Chemical Resources Laboratory, Tokyo Institute of Technology

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Abstract

<jats:title>Abstract</jats:title> <jats:p>Infrared spectra of protected amino acids, N-benzoxycarbonyl-l-proline and N-benzoxycarbonyl-l-isoleucine were measured in the gas phase from 10 to 3 µm. 4 and 3 conformers were found, respectively. The spectra in the 3 µm region reveal the carboxylic OH and amide NH bonds do not participate in hydrogen bonding with neighboring amide groups despite the highest acidity in the molecule. The spectra in the 10–5 µm region imply the main chain structure is the same among the conformers.</jats:p>

Journal

  • Chemistry Letters

    Chemistry Letters 40 (10), 1157-1158, 2011-09-28

    Oxford University Press (OUP)

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