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IR absorption spectra of nematic liquid crystals oriented by an external a.c. electric field

โœ Scribed by N. Kirov; P. Simova; H. Ratajczak

Publisher
Elsevier Science
Year
1982
Weight
880 KB
Volume
23
Category
Article
ISSN
0378-4487

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โœฆ Synopsis

The influence of a.c. electric field (5kHz) on the IR and FIR spectra of the nematic phase of some liquid crystals with strong positive dielectric anisotropy ( Eaz 10 -20) and weak negative dielectric anisotropy (6,~ -0,2 -0,7) was investigated. The changes in the half-widths and integral intensity are explained by means of the changes in the molecular'orientation due to the electric field influence.

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A study of the kinetics of reorientation of a uniaxially aligned nematic liquid crystal (4-pentyl-4'-cyanobiphenyl) under the influence of an external ac electric field is reported. Step-scan FT-IR was employed for the acquisition of the dynamic linear dichroism spectra. 2D FT-IR frequency correlat