Photoalignment of liquid crystals in a hydrogen-bonding-directed layer-by-layer ultrathin film

	Photoalignment of liquid crystals in a hydrogen-bonding-directed layer-by-layer ultrathin film
其他题名	论文其他题名
	Lv F.; Peng Z. H.; Zhang L. L.; Yao L. S.; Liu Y.; Xuan L.
	2009
发表期刊	Liquid Crystals
ISSN	0267-8292
卷号	36 期号:1 页码:43-51
摘要	In this paper, a new type of hydrogen-bonding-directed layer-by-layer (LBL) ultrathin film with photosensitive cinnamoyl chromophores was prepared. It could induce uniform alignment of liquid crystals (LCs) after being irradiated by linearly polarised ultraviolet light (LPUVL). The hydrogen-bonding-directed formation of a photochromic multilayer film was achieved on the basis of an alternating assembly of poly(4-vinylpyridine) (PVPy) and poly(4-acryloyloxy)cinnamic acid (PCA). The assembly process was followed by UV-visible spectroscopy. The nature of the interaction between the two polymers was identified as a hydrogen bond through Fourier transform infrared spectroscopy. When the film was irradiated by LPUVL, the cinnamoyl units in the film underwent [2+2] cycloaddition along the electric vector direction of the LPUVL. The polarised UV-visible spectra proved that the film was anisotropic, and then the film could induce homogeneous alignment of nematic LCs. With the number increment of the bilayers, the alignment effect of the multilayer film was enhanced, and the contrast ratio became higher. The orientation direction of the LCs was always perpendicular to the electric vector of the irradiating LPUVL.
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/181722/25671
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Lv F.,Peng Z. H.,Zhang L. L.,et al. Photoalignment of liquid crystals in a hydrogen-bonding-directed layer-by-layer ultrathin film[J]. Liquid Crystals,2009,36(1):43-51.
APA	Lv F.,Peng Z. H.,Zhang L. L.,Yao L. S.,Liu Y.,&Xuan L..(2009).Photoalignment of liquid crystals in a hydrogen-bonding-directed layer-by-layer ultrathin film.Liquid Crystals,36(1),43-51.
MLA	Lv F.,et al."Photoalignment of liquid crystals in a hydrogen-bonding-directed layer-by-layer ultrathin film".Liquid Crystals 36.1(2009):43-51.

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