On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores

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	On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores
	Lin WY(林韦佑) ; Wang XW(王献文) ; Liu ZC(刘志常) ; Xu J(许俊) ; Chen ZW(陈智伟) ; Yang YQ(杨云钦) ; Huang SL(黄守龄) ; Yang XQ(杨小青) ; Lu TY(陆天尧)
刊名	Chem.-Asian J.
	2007
卷号	2 期号:6 页码:764-774
ISSN号	1861-4728
其他题名	On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores
通讯作者	陆天尧
英文摘要	Two dimers and a series of polymers with 5,6-endo pendant aryl groups that contain different substituents at the para positions were synthesized. The conformation and stereochemistry of the dimers and polymers were determined by nonlinear optical analysis (EFISH) as well as UV/Vis and C-13 NMR spectroscopy. The chemical shifts of C7 for the polymers appeared as two peaks in the C-13 NMR spectra when the substituents are electron -withdrawing groups. The percentage decrease in the relative extinction coefficient of the polymers, ed, was linearly related to the Hammett constant sigma. Polynorbornenes with electron-with- drawing substituents may adopt isotactic stereochemistry with all pendant groups aligned in one direction. The nature of the interactions between neighboring chromophores may be one of the most important factors in directing the stereoregularity and conformation of these polymers. The corresponding polymers derived from the exo isomers appeared to be less stereo-regular.
学科主题	分析化学
收录类别	SCI
原文出处	http://dx.doi.org/10.1002/asia.200700011
语种	英语
WOS记录号	WOS:000247199500008
公开日期	2013-08-14
内容类型	期刊论文
源URL	[http://202.127.28.38/handle/331003/27675]
专题	上海有机化学研究所_上海有机化学研究所
推荐引用方式 GB/T 7714	Lin WY,Wang XW,Liu ZC,et al. On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores[J]. Chem.-Asian J.,2007,2(6):764-774.
APA	林韦佑.,王献文.,刘志常.,许俊.,陈智伟.,...&陆天尧.(2007).On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores.Chem.-Asian J.,2(6),764-774.
MLA	林韦佑,et al."On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores".Chem.-Asian J. 2.6(2007):764-774.