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On the tacticity of polynorbornenes with 5,6-endo pendant groups that contain substituted aryl chromophores
其他题名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)
2007
发表期刊Chem.-Asian J.
ISSN1861-4728
卷号2期号:6页码:764-774
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.
学科领域分析化学
部门归属台湾大学; 上海有机所
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收录类别SCI
语种英语
WOS记录号WOS:000247199500008
引用统计
被引频次:41[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sioc.ac.cn/handle/331003/27675
专题上海有机化学研究所
通讯作者Lu TY(陆天尧)
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.
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