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Effects of temperature change on nematic liquid crystal

C. M. TOPALĂ1,* , S. ANGHEL1

Affiliation

  1. University of Piteşti, Faculty of Science, Târgu din Vale No.1, Piteşti – 110040, Romania

Abstract

We have investigated, at different temperatures, the ATR spectrum of 4-cyanophenyl-4’-hexylbenzoate (CP6B) in crystal, liquid crystal and isotropic phase. The changes in the IR spectra due to temperature variations (intensity, half width and wavenumber shift of spectral lines characteristic to some chemical bonds) were correlated with some structural characteristics. We have chosen to study CP6B because of the presence of the carbonyl group (C=O) in its molecular structure. This group is present in over 80 liquid crystals synthesized by us, in organic chemistry laboratory from University of Pitesti, whose spectral study we are performing in present..

Keywords

Cyanophenyl, Liquid crystals, IR spectra, Attenuated Total Reflexion, vibrational stretching.

Submitted at: Dec. 4, 2011
Accepted at: Feb. 20, 2012

Citation

C. M. TOPALĂ, S. ANGHEL, Effects of temperature change on nematic liquid crystal, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 1-2, pp. 100-105 (2012)