文献类型：期刊文献

英文题名：Nematic liquid crystal alignment on phthalocyanine LB films

作者：Lu, R.B.[1]; Xu, K.S.[1]; Zhang, Z.K.[1]; Zhong, J.H.[1]; Li, G.Z.[1]; Wu, H.M.[1]; Lu, Z.H.[1]

机构：[1]E CHINA UNIV SCI & TECHNOL,DEPT PHYS,SHANGHAI 200237,PEOPLES R CHINA;[2]SOUTHEAST UNIV,NATL LAB MOL & BIOMOL ELECT,NANJING 210018,PEOPLES R CHINA

年份：1996

卷号：289

起止页码：77

外文期刊名：MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS

收录：;EI(收录号：1997153528869);WOS:【SCI-EXPANDED(收录号:WOS:A1996WA96300007)】；

语种：英文

外文关键词：liquid crystal; aligning layer; Langmuir-Blodgett films

摘要：Two newly synthesized phthalocyanine compounds' Langmuir-Blodgett (LB) films were fabricated to align nematic liquid crystal(LC). Optical spectra were used to characterize the films and antiparallel type LC cells were constructed adopting SnPc and VOPc LB films as aligning layers. We found that LC molecules would align homogeneously on SnPc LB films along the deposition direction while those of on VOPc LB films align obliquely. The electrooptic effects of the cells were investigated and they showed an in agreement with LC alignment configurations. A TN type cell using SnPc LB films as aligning layer was also investigated. It has a better electrooptic effect than the antiparallel type. Since the two phthalocyanine compounds have a similar molecular structure but with different complex metals, and the corresponding LB films orient with the nearly same orientation angle on the substrates, ignoring other interactions, we think the alignment mechanism that results in different alignment configurations may be concerned with the interaction between LC molecules and oxygen atoms that are out of the macrocycle planes in VOPc LB films.