Chain helicity of a poly(phenylacetylene) with chiral centers between   backbone and mesogenic groups on side chains

doi:10.1016/j.polymer.2008.06.007

CORC > 北京大学 > 化学与分子工程学院

	Chain helicity of a poly(phenylacetylene) with chiral centers between backbone and mesogenic groups on side chains
	Liu, Jia-Hao ; Yan, Jing-Jing ; Chen, Er-Qiang ; Lam, Jacky W. Y. ; Dong, Yu-Ping ; Liang, De-Hai ; Tang, Ben Zhong
刊名	polymer
	2008
关键词	chiral poly(phenylacetylene) chain helicity exciton coupling CHIROPTICAL PROPERTIES MACROMOLECULAR HELICITY POLY(PROPIOLIC ESTERS) CONJUGATED POLYMERS CIRCULAR-DICHROISM POLYACETYLENES ACID POLY(N-PROPARGYLAMIDES) AZOBENZENE INVERSION
DOI	10.1016/j.polymer.2008.06.007
英文摘要	An optically active poly(phenylacetylene), poly{2-(R)-methyl-2-[4'-(tetradecyloxy)biphenyl-4-yloxy]-propyl 4-ethynylbenzoate} (P1) is synthesized in a high yield with a high molecular weight (1.3 x 10(6) g/mol) by [Rh(nbd)Cl](2) catalyst. The chemical structure of the polymer is characterized by IR and NMR spectroscopies with satisfactory analysis data. The polymer is soluble in many common organic solvents. It shows circular dichroism (CD) band in the absorption region of the polyacetylene backbone, indicating that P1 is chiroptical owing to the formation of helical conformation with an excess screw sense. Combining the results of CD and light scattering experiments, we find that addition of poor solvent can induce the neighboring helical segments within a single polymer strand to become closer, resulting in exciton coupling prior to polymer precipitation. The exciton coupling can be kept in the solid state after solvent evaporation. (c) 2008 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000258437100003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Polymer Science; SCI(E); 25; ARTICLE; 16; 3366-3370; 49
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151446]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liu, Jia-Hao,Yan, Jing-Jing,Chen, Er-Qiang,et al. Chain helicity of a poly(phenylacetylene) with chiral centers between backbone and mesogenic groups on side chains[J]. polymer,2008.
APA	Liu, Jia-Hao.,Yan, Jing-Jing.,Chen, Er-Qiang.,Lam, Jacky W. Y..,Dong, Yu-Ping.,...&Tang, Ben Zhong.(2008).Chain helicity of a poly(phenylacetylene) with chiral centers between backbone and mesogenic groups on side chains.polymer.
MLA	Liu, Jia-Hao,et al."Chain helicity of a poly(phenylacetylene) with chiral centers between backbone and mesogenic groups on side chains".polymer (2008).