1A10 アゾベンゼンポリマー膜による液晶光配向制御における構造因子

概要

論文の詳細を見る
A surface-assisted photoregulation of nematic liquid crystals (LCs) by linearly polarized light (LPL) was investigated for amorphous thin films of polymethacrylates attached to azobenzene derivatives. These azobenzenes were substituted at their p-position by cyclohexyl group and fluoride, and did not substituted. The dichroism of films was induced in all polymers by the irradiation with LPL, and dichroic ratios of substituted azobenzene polymers were higher than that of a non-substituted azobenzene polymer. It was suggested that bulky substituents suppress the thermal relaxation of the orientation of azobenzenes. However, the non-substituted azobenzene was the most effective for a photoregulation of LCs. This polymer induced a homogeneous aligmnent, even when a film was irradiated with LPL at a low exposure energy. It was considered that the structure of azobenzene is an important factor for photoregulating an LC alignment rather than the extent of dichroism of films.
日本液晶学会の論文
1996-09-30