垂直排列液晶盒中反铁电液晶TFMHxPOCBC-D2偏振红外光谱研究
STUDY OF POLARIZED FT-IR FOR ANTIFERROELECTRIC LIQUID CRYSTAL TFMHxPOCBC-D2 IN A HOMEOTROPICALLY ALIGNED CELL
-
摘要: 本文通过偏振红外吸收光谱研究了铁电与反铁电液晶分子TFMHxPOCBC-D2 (4-(trifluoromethylhexy-3-d2 carbonyl)phenyl 4′-octyloxybiphenyl caboxylate)在垂直排列取向液晶盒中CD2基团绕手征性烷基链转动的受阻行为.实验结果显示CD2的偏振红外吸收在Sm-C*相不同于Sm-C*A相.建立了一个CD2转动受阻模型,在这一模型的基础上,对CD2的偏振红外吸收进行了模拟计算,较好地解释了CD2红外吸收在铁电和反铁电液晶相下的行为差异,得到了CD2基团绕手征性烷基链转动受阻的结论.Abstract: We have investigated the polarization dependence of FT-IR of the stretching of CD2 in chiral alkyl chain of TFMHxPOCBC-D2 (4-(trifluoromethylhexy-3-d2 carbonyl) phenyl 4′-octyloxybiphenyl caboxylate) with a homeotropically aligned cell.It is found that the polarization dependence of Sm-C* and that of Sm-C*A are different.Simulation calculation indicates that the rotation of CD2 around the alkyl chain is hindered.
-
-
计量
- 文章访问数: 317
- HTML全文浏览数: 97
- PDF下载数: 6
- 施引文献: 0