| 水溶性树枝形聚合物微反应器笼效应研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 袁钊 郑少君 曾毅 陈金平 李迎迎 韩永滨 李嫕 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金资助项目，国家重点基础研究发展规划项目，北京市科技新星计划项目 |
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| 摘 要： | 本工作以羧基为末端基团的芳醚树枝形聚合物Gn(n=1-4)和核心为十二烷基链的聚酰胺-胺树枝形聚合物PGm(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Gn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PGm对CH3-DBK的限制作用远低于芳醚树枝形聚合物Gn.
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| 关 键 词： | 树枝形聚合物 微反应器 光解反应 笼效应 |
| 收稿时间： | 2011-01-05 |
Investigation of Cage Effect of Water-Soluble Dendrimers as Microreactors |
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| 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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| Authors: | YUAN Zhao ZHENG Shao-jun ZENG Yi CHEN Jin-ping LI Ying-ying HAN Yong-bin LI Yi |
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| Affiliation: | Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R.China |
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| 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 Gn(n=1-4) and PAMAM dendrimers PGm(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 Gn,indicative of a better confined microenvironment of higher generation Gn.The cage effect can also be enhanced by increasing the concentration of dendrimer.PGm(m=1-3) have much less constrained microenvironment,consequently exhibit low cage effect. |
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| Keywords: | dendrimer microreactor photolysis cage effect |
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