水溶性树枝形聚合物微反应器笼效应研究

doi:10.7517/j.issn.1674-0475.2011.02.123

影像科学与光化学 ›› 2011, Vol. 29 ›› Issue (2): 123-132.DOI: 10.7517/j.issn.1674-0475.2011.02.123

水溶性树枝形聚合物微反应器笼效应研究

袁钊, 郑少君, 曾毅, 陈金平, 李迎迎, 韩永滨, 李嫕

中国科学院理化技术研究所光化学转换与功能材料重点实验室, 北京100190

收稿日期:2011-01-05 修回日期:2011-02-27 出版日期:2011-03-23 发布日期:2011-03-23
通讯作者: 李嫕;曾毅
基金资助:
国家自然科学基金资助项目(20772134,20733007,21002109,21073215,21004072);国家重点基础研究发展规划项目(2010CB934500和2007CB808004);北京市科技新星计划

Investigation of Cage Effect of Water-Soluble Dendrimers as Microreactors

YUAN Zhao, ZHENG Shao-jun, ZENG Yi, CHEN Jin-ping, LI Ying-ying, HAN Yong-bin, LI Yi

Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R.China

Received:2011-01-05 Revised:2011-02-27 Online:2011-03-23 Published:2011-03-23

摘要/Abstract

摘要： 本工作以羧基为末端基团的芳醚树枝形聚合物G_n(n=1-4)和核心为十二烷基链的聚酰胺-胺树枝形聚合物PG_m(m=1-3)作为光化学微反应器,研究了1-苯基-3-对甲苯基丙酮在水溶液中的α-光解反应,并计算了笼效应.研究结果表明,芳醚树枝形聚合物G_n的笼效应随代数增加而增大,高代数树枝形聚合物表现出对底物分子更强的限制性作用,增加树枝形聚合物的浓度可以提高笼效应;聚酰胺-胺树枝形聚合物PG_m对CH₃-DBK的限制作用远低于芳醚树枝形聚合物G_n.

关键词: 树枝形聚合物, 微反应器, 光解反应, 笼效应

Abstract: The α-cleavage photoreactionof 1-phenyl-3-p-tolyl-propan-2-one(CH3-DBK) hasbeen conductedin aqueoussolutions of water-soluble poly(aryl ether) dendrimers G_n(n=1-4) and PAMAM dendrimers PG_m(m=1-3).The product distributionreveals that dendrimers can provide a more constrained microenvironment than the homogenous solutions.The cage effect increases with the generation of G_n,indicative of a better confined microenvironment of higher generation G_n.The cage effect can also be enhanced by increasing the concentration of dendrimer.PG_m(m=1-3) have much less constrained microenvironment,consequently exhibit low cage effect.

Key words: dendrimer, microreactor, photolysis, cage effect

中图分类号:

袁钊, 郑少君, 曾毅, 陈金平, 李迎迎, 韩永滨, 李嫕. 水溶性树枝形聚合物微反应器笼效应研究[J]. 影像科学与光化学, 2011, 29(2): 123-132.

YUAN Zhao, ZHENG Shao-jun, ZENG Yi, CHEN Jin-ping, LI Ying-ying, HAN Yong-bin, LI Yi. Investigation of Cage Effect of Water-Soluble Dendrimers as Microreactors[J]. Imaging Science and Photochemistry, 2011, 29(2): 123-132.

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水溶性树枝形聚合物微反应器笼效应研究

Investigation of Cage Effect of Water-Soluble Dendrimers as Microreactors

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