Monolayers of long-chain alcohols, fatty acid esters at the air/water interface: a comparison by external infrared reflection-absorption spectrometry

Arne Gericke; Heinrich Huehnerfuss

doi:10.1117/12.166727

31 January 1994 Monolayers of long-chain alcohols, fatty acids, and fatty acid esters at the air/water interface: a comparison by external infrared reflection-absorption spectrometry

Arne Gericke, Heinrich Huehnerfuss

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Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166727
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

The properties of C₁₅, C₁₆, C₁₈ and C₂₀-alcohols, fatty acids and fatty acid esters are investigated by external infrared reflection-absorption spectrometry in the range 3000 - 1000 cm^-1. Analysis of the methylene stretching vibration shows that an increasing space requirement of the hydrophilic headgroup (fatty acid ester > fatty acid >= alcohol) for the same chain length leads to higher chain disorder (i.e., more gauche conformers). However, for a given headgroup the prolongation of the alkyl-chain generally results in an increased hydrophobic interaction and thus in a higher chain-order, i.e., the molecules attain a more transconformation.

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Arne Gericke and Heinrich Huehnerfuss "Monolayers of long-chain alcohols, fatty acids, and fatty acid esters at the air/water interface: a comparison by external infrared reflection-absorption spectrometry", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166727

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