Solute NMR study of a bimesogenic liquid crystal with two nematic phases

被引：11
|
作者：
Dong, R. Y. [1 ]
Kohlmeier, A. [2 ]
Tamba, M. G. [2 ]
Mehl, G. H. [2 ]
Burnell, E. E. [3 ]
机构：
[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[2] Univ Hull, Dept Chem, Kingston Upon Hull HU6 7RX, N Humberside, England
[3] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada
来源：
CHEMICAL PHYSICS LETTERS | 2012年 / 552卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
ORIENTATIONAL ORDER; MOLECULAR-STRUCTURE; PARAMETERS; ALGORITHMS; SPECTRA;
D O I：
10.1016/j.cplett.2012.09.051
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Recent interest in bimesogenic liquid crystals showing two nematic phases has led us to investigate the nematic mean-field interactions in these nematic phases by using rigid solutes as probes. The nematic potential that is modelled by two independent Maier-Saupe terms is successful in fitting the observed dipolar couplings (molecular order parameters) of para-, meta-and ortho-dichlorobenzene solutes in both nematic phases of 39 wt.% 4-n-pentyl-4'-cyanobiphenyl (5CB) in alpha,omega-bis (4-4'-cyanobiphenyl) nonane (CBC9CB) to better than the 5% level. The derived liquid-crystal potential parameters G(1) and G(2) for each solute in the N and N-x phases are discussed. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：44 / 48
页数：5
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