Investigation of conformational mobility of 4-pentyl-4'-cyanobiphenyl by IR spectroscopy methods

Lev M. Babkov; E. S. Vedyaeva; I. I. Gnatyuk; Galina A. Puchkovska; S. V. Truhachev; J. I. Kukielski

doi:10.1117/12.486660

11 December 2002 Investigation of conformational mobility of 4-pentyl-4'-cyanobiphenyl by IR spectroscopy methods

Lev M. Babkov, E. S. Vedyaeva, I. I. Gnatyuk, Galina A. Puchkovska, S. V. Truhachev, J. I. Kukielski

Proceedings Volume 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals; (2002) https://doi.org/10.1117/12.486660
Event: XV International School on Spectroscopy of Molecules and Crystals, 2001, Chernivsti, Ukraine

Abstract

The conformational mobility and structure of 4-pentyl-4'-cyanobiphenyl (5CB) in liquid and liquid crystal states have been investigated by methods of IR spectroscopy. IR absorption spectra are measured in the temperature range of 297-425 K in 400-4000 cm-1 spectral region. The IR spectra are modeled for the conformers of 5CB which differ in the orientaiton of the alkyl radical wiht respect to the biphenyl fragment and of the benzene rings with respect to one another. It is found that the temperature changes of IR spectra are determined by the molecule conformational mobility of 5CB. From the analysis of the spectra, we determined the most probable configurations of the molecules which were realized in the sample within the studied temperature interval.

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Lev M. Babkov, E. S. Vedyaeva, I. I. Gnatyuk, Galina A. Puchkovska, S. V. Truhachev, and J. I. Kukielski "Investigation of conformational mobility of 4-pentyl-4'-cyanobiphenyl by IR spectroscopy methods", Proc. SPIE 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals, (11 December 2002); https://doi.org/10.1117/12.486660

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