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学科主题: 分析化学
题名: 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
作者: 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)
通讯作者: 陆天尧
刊名: Chem.-Asian J.
发表日期: 2007
卷: 2, 期:6, 页:764-774
收录类别: SCI
部门归属: 台湾大学; 上海有机所
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.
语种: 英语
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WOS记录号: WOS:000247199500008
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/27675
Appears in Collections:上海有机化学研究所_期刊论文

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Recommended Citation:
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.
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