Direct Evidence of "Zig-Zag" shape of liquid crystal molecular structure in Chiral SmC phase using FTIR spectroscopy.
Abstract
We report on the direct evidence of zig-zag shape of liquid crystal molecular structure in chiral SmC phase by Fourier Transform Infrared Spectroscopy (FTIR). Polar plots of the absorption profiles of phenyl groups and alkyl tails in the chiral SmC phase clearly show that W399 and W314 have structures in which the tails tilt 10 degrees less than the cores do from the layer normal at temperatures far below the smectic-A to smectic-C phase transition. The behaviors of the phenyl core, alkyl tail and optical tilts from the layer normal with respect to temperature will be presented. In general the materials studied show an orientation defference between core and tail less than 2 degrees. X-ray measurement of layer spacing and time resolved IR spectroscopy results will be dicussed. * Supported by NSF MRG Grant DMR 92-24168.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1996
- Bibcode:
- 1996APS..MAR.A1713P