Sum Frequency Generation Spectroscopic Studies on the Structures of the Monolayers of L, DL-ornithine and L, DL-lysine Derivatives

  • OHE Chikaomi
    Department of Chemistry, School of Science and Engineering, Waseda University
  • ITOH Koichi
    Department of Chemistry, School of Science and Engineering, Waseda University

Bibliographic Information

Other Title
  • 和周波発生分光法によるパルミトイル‐L‐,‐DL‐オルニチンとパルミトイル‐L‐,‐DL‐リジンの単分子膜の構造
  • ワシュウハ ハッセイ ブンコウホウ ニ ヨル パルミトイル L DL オルニチン ト パルミトイル L DL リジン ノ タンブンシ マク ノ コウゾウ

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Abstract

Sum frequency generation (SFG) spectroscopic studies were performed on the structures of the Langmuir-Blodgett monolayers of palmitoyl-L and DL-ornithines (PO) and parmitoyl-L and DL-lysines (PL) on a quartz substrate and those of the monolayers of PO and PL at the air-water interface. The analyses of the SFG spectra based on spectral simulations indicated that (i) the NH groups in the monolayers of L-PO and L-PL on the quartz substrate are more or less parallel to the substrate taking two different orientations of±ca. 30° with respect to the drawing direction of the samples employed by preparation processes, (ii) on increasing the surface pressures of the L-PO and L-PL monolayers at the air-water interface the tilt angles of the CH3 group with respect to the surface normal decreases appreciably, and (iii) the tilt angle of the CH3group in the DL-PL monolayer is appreciably smaller than that of the L-PL monolayer, suggesting the existence of a specific interaction between the L- and D-enantiomers in the DL-PL monolayer at the air-water interface.

Journal

  • Shinku

    Shinku 47 (7), 535-543, 2004

    The Vacuum Society of Japan

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