FTIR studies of Langmuir-Blodgett films of arachidic acid

Y. Fujimoto; A. Higashi; Yukihiro Ozaki; Takashi Kato; N. Matsumoto; Keiji Iriyama

doi:10.1117/12.146132

17 June 1993 FTIR studies of Langmuir-Blodgett films of arachidic acid

Y. Fujimoto, A. Higashi, Yukihiro Ozaki, Takashi Kato, N. Matsumoto, Keiji Iriyama

Proceedings Volume 1921, Laser Spectroscopy of Biomolecules; (1993) https://doi.org/10.1117/12.146132
Event: Laser Spectroscopy of Biomolecules: 4th International Conference on Laser Applications in Life Sciences, 1992, Jyvaskyla, Finland

Abstract

FT-IR transmission and reflection-absorption (RA) spectra were measured for Langmuir- Blodgett (LB) films of arachidic acid and the following conclusion could be reached from the measurements: (1) The structure of arachidic acid monolayer films deposited on CaF₂ plates changed with the surface pressure. (2) The structure of the monolayer films deposited on Au-evaporated glass slides did not show a marked dependency on the surface pressure, but the fraction of the trans configuration for the Ca-Cb-CequalsO group increased significantly with the pressure. (3) The carboxylic acid groups probably form a hydrogen bonding between the neighboring molecules in the monolayer films deposited on both CaF₂ plates and Au- evaporated glass slides. (4) Subcell packing of hydrocarbon chains in arachidic acid LB films on CaF₂ plates changes from hexagonal to orthorhombic upon going from the first monolayer to the second monolayer.

Citation Download Citation

Y. Fujimoto, A. Higashi, Yukihiro Ozaki, Takashi Kato, N. Matsumoto, and Keiji Iriyama "FTIR studies of Langmuir-Blodgett films of arachidic acid", Proc. SPIE 1921, Laser Spectroscopy of Biomolecules, (17 June 1993); https://doi.org/10.1117/12.146132

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