31 January 1994 Polarization modulation FTIR spectroscopy of a spread monolayer at the air-water interface
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Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166641
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada
Abstract
This study devoted to FTIR spectroscopy of monolayers spread at the air/water interface is, to our knowledge, the first one presenting complete mid-infrared monolayer spectra devoid of strong water vapor absorptions. This has been possible by using the PM-IRRAS method combining polarization modulation with two channel simultaneous acquisition. Due to its differential character, the detected signal is not sensitive to the isotropic absorptions of the sample environment. From theoretical simulations and experiments, the best angle of incidence was found to be near 76 degree(s) for the detection of intrasurface as well as out of surface transition moments. Under these experimental conditions, the absorption bands of the monolayer appear upwards or downwards in the normalized difference (covered vs uncovered) PM-IRRAS spectra depending on the orientation (parallel or perpendicular) of their transition moments with respect to the interface.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Blaudez, D. Blaudez, Thierry Buffeteau, Thierry Buffeteau, J. C. Cornut, J. C. Cornut, B. Desbat, B. Desbat, N. Escafre, N. Escafre, Michel Pezolet, Michel Pezolet, J. M. Turlet, J. M. Turlet, } "Polarization modulation FTIR spectroscopy of a spread monolayer at the air-water interface", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166641; https://doi.org/10.1117/12.166641
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