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	Synthesis and characterization of hydroxyethyl chitosan grafted by carboxyl ending DOVOB dendrimer: A novel liquid crystalline polymer
	Zhao, Yaqing ; Chen, Jian ; Zeng, Erman ; Hu, Xiaolan ; Liu, Anhua ; Dong, Yanming ; Dong YM(董炎明)
	2008-05
关键词	chitosan dendrimer lyotropic cholesteric liquid crystal
英文摘要	A novel chitosan derivative, hydroxyethyl chitosan grafted 3,4,5-tris[p-(n-dodecyloxy)-m-methoxybenzyloxy]benzoate (HECS-g-DOVOB) was prepared via grafting dendrimer 3,4,5-tris[p-(n-dodecyloxy)-m-methoxybenzyloxy]benzoic acid (DOVOB acid) onto hydroxyethyl chitosan (HECS). The structure of HECS-g-DOVOB was investigated by means of FTIR, H-1 NMR, UV and circular dichroism (CD). The degree of substitution was measured to be about 0.39 per glucose unit. The DOVOB acid was able to self-assemble into a thermotropic hexagonal columnar liquid crystalline phase showing fan-like texture, the aqueous HECS solution formed lyotropic cholesteric liquid crystal showing fingerprint texture. Whereas, HECS-g-DOVOB formed lyotropic cholesteric liquid crystal in concentrated DMSO solution with a planar texture, which was different to that of both DOVOB and HECS. The cholesteric pitch of HECS-g-DOVOB is much smaller than that of HECS. The fluorescence spectrum of HECS-g-DOVOB shows excimer fluorescence which is very similar to the dendrimer is a good indication for light-emitting polymeric material. (C) 2008 Elsevier Ltd. All rights reserved.; National Natural Science Foundation, China [20774077]; Natural Science Foundation of Fujian, China [E0510003, E0710025]; Project of Science and Technology of Xiamen, China [3502Z20055013]
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:0.1016/j.carbpol.2008.04.042]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhao, Yaqing,Chen, Jian,Zeng, Erman,et al. Synthesis and characterization of hydroxyethyl chitosan grafted by carboxyl ending DOVOB dendrimer: A novel liquid crystalline polymer[J],2008.
APA	Zhao, Yaqing.,Chen, Jian.,Zeng, Erman.,Hu, Xiaolan.,Liu, Anhua.,...&董炎明.(2008).Synthesis and characterization of hydroxyethyl chitosan grafted by carboxyl ending DOVOB dendrimer: A novel liquid crystalline polymer..
MLA	Zhao, Yaqing,et al."Synthesis and characterization of hydroxyethyl chitosan grafted by carboxyl ending DOVOB dendrimer: A novel liquid crystalline polymer".(2008).

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