Photoinduced liquid crystal alignment by layer-by-layer ultrathin films with dual photoreaction moieties

	Photoinduced liquid crystal alignment by layer-by-layer ultrathin films with dual photoreaction moieties
其他题名	论文其他题名
	Zhang L. L.; Peng Z. H.; Yao L. S.; Lv F. Z.; Xuan L.
	2008
发表期刊	Liquid Crystals
ISSN	0267-8292
卷号	35 期号:2 页码:163-171
摘要	A novel layer-by-layer (LBL) film containing dual photoreaction groups, cinnamoyl and azobenzene, was prepared from poly(diallyldimethylammonium chloride) (PDDA) and a photosensitive polyanion, PCAzo, in aqueous solution via electrostatic attraction. The film was able to induce uniform alignment of liquid crystals (LCs) with good stability and 2.3 degrees pretilt angle by oblique irradiation with linearly polarised ultraviolet light (LPUVL). UV absorption and FTIR spectroscopic results indicate that the photoreactions of the two photoreactive groups jointly participate in generating the anisotropy of the film. The dichroic ratio of the film was found to depend on the number of adsorbed layers. The thicker film has the larger dichroic ratio after the LPUVL irradiation. The reorientation behaviour of the LC molecules was found to be associated with the LBL film thickness. Experiment results revealed that the photo-crosslinking of the cinnamoyl groups was responsible for the stability of the anisotropic orientation, and the isomerisation of the azobenzene chromophores led primarily to the appropriate pretilt angle.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24861
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang L. L.,Peng Z. H.,Yao L. S.,et al. Photoinduced liquid crystal alignment by layer-by-layer ultrathin films with dual photoreaction moieties[J]. Liquid Crystals,2008,35(2):163-171.
APA	Zhang L. L.,Peng Z. H.,Yao L. S.,Lv F. Z.,&Xuan L..(2008).Photoinduced liquid crystal alignment by layer-by-layer ultrathin films with dual photoreaction moieties.Liquid Crystals,35(2),163-171.
MLA	Zhang L. L.,et al."Photoinduced liquid crystal alignment by layer-by-layer ultrathin films with dual photoreaction moieties".Liquid Crystals 35.2(2008):163-171.

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