Orientation Studies by NMR on Chlorobenzenes in Nematic Liquid Crystals
Orientation Studies by NMR on Chlorobenzenes in Nematic Liquid Crystals
复制标题
向列液晶中氯苯的核磁共振取向研究
DOI：
10.1080/00268948908042699
复制
发表时间：
1989
影响因子：
0.7
通讯作者：
P. Diehl
中科院分区：
文献类型：
--
作者：
M. Kellerhals;P. Diehl
摘要 研究了苯以及 11 种不同的氯取代苯在液晶溶剂 EBBA、ZLI 1132 以及两者的混合物中的取向。已经确定了键对溶质分子与溶剂的相互作用能的贡献。人们发现它们是每个分子的特征，因此仅根据键的数量和类型以及相对于溶剂导向剂的键方向来预测 S−值是非常不精确的。正如 Van der Est 等人的早期方法所建议的，如果还考虑分子形状，即键的位置，则可以大大改善预测。
Abstract The orientations of benzene as well as 11 different chlorine substituted benzenes have been studied in the liquid crystal solvents EBBA, ZLI 1132 and in a mixture of the two. Bond contributions to the interaction energy of the solute molecules with the solvents have been determined. They are found to be characteristic for each molecule so that a prediction of S−values exclusively based on the number and type of bonds as well as on bond orientation with respect to the solvent director is very imprecise. The predictions can be considerably improved if the molecular shape, i.e. location of the bonds is also considered, as suggested in an earlier approach by Van der Est et al.