Fourier Transform Infrared Spectroscopic Investigation of the Electric-Field-Induced Reorientation of the Nematic 7CPB with Different Prealignment

Authors: Klimov, E.¹; Siesler, H.W.¹

Source: Applied Spectroscopy, Volume 58, Issue 8, Pages 220A-244A and 887-1022 (August 2004) , pp. 952-957(6)

Publisher: Society for Applied Spectroscopy

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Abstract:

Time-resolved Fourier transform infrared (FT-IR) polarization spectroscopy was employed to study the electric-field-induced reorientation of nematic p-cyanophenyl-p-n-heptylbenzoate (7CPB) in the bulk of the cell and near (within 1 μm) the surface of the electrodes. The initial orientation of 7CPB on the germanium electrodes was varied in order to obtain information concerning the behavior of the liquid crystalline molecules in the boundary region. Model systems containing the 7CPB on rubbed polyimide and poly(vinyl alcohol), non-rubbed polyimide and poly(vinyl alcohol), and blank germanium were prepared and investigated.

Keywords: TIME-RESOLVED FOURIER TRANSFORM INFRARED SPECTROSC; NEMATIC LIQUID CRYSTAL; ELECTRIC-FIELD-INDUCED REORIENTATION; BULK AND SURFACE REGION; INITIAL ORIENTATION

Document Type: Research article

DOI: 10.1366/0003702041655313

Affiliations: 1: Department of Physical Chemistry, University of Duisburg-Essen, Schuetzenbahn 70, 45127 Essen, Germany

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