| Photochemical reaction of azobenzene in solvent-swollen Nafion membranes |
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| 引用本文： | TUNG,Chen-Ho GUAN,Jing-QuInstitute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China. Photochemical reaction of azobenzene in solvent-swollen Nafion membranes[J]. 中国化学, 1996, 14(6): 541-548. DOI: 10.1002/cjoc.19960140609 |
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| 作者姓名： | TUNG Chen-Ho GUAN Jing-QuInstitute of Photographic Chemistry Chinese Academy of Sciences Beijing 100101 China |
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| 作者单位： | TUNG，Chen-Ho GUAN，Jing-QuInstitute of Photographic Chemistry，Chinese Academy of Sciences，Beijing 100101，China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | The photochemical reactions of azobenzene (AB) incorporated into different solvent-swollen Nafion membranes were investigated. The location of azobenzene in water-swollen Nafion membranes was different from that in methanol-swollen Nafion membranes, which was responsible for the different photochemical reactions of AB. In methanol-swollen Nafion membranes only trans-cis isomerization took place, while in water-swollen Nafion membranes photochemical cyclization of AB occurred after rapid trons-cis isomerization. The relation between the relative quantum yields and the light intensity showed that the cyclization was a two-photo process. The numbers of AB molecules per cluster (nAB /cluster) in Nafion membranes with different AB concentrations and different water contents were calculated. Under the experimental condition two competitive photocyclization mechanisms were suggested by nAB /cluster in Nafion membranes, relative quantum yields of the cyclization, and the change of the ratio of benzidine to benz
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Photochemical reaction of azobenzene in solvent-swollen Nafion membranes |
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| TUNG,Chen-Ho GUAN,Jing-QuInstitute of Photographic Chemistry,Chinese Academy of Sciences,Beijing ,China. Photochemical reaction of azobenzene in solvent-swollen Nafion membranes[J]. Chinese Journal of Chemistry, 1996, 14(6): 541-548. DOI: 10.1002/cjoc.19960140609 |
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| Authors: | TUNG Chen-Ho GUAN Jing-QuInstitute of Photographic Chemistry Chinese Academy of Sciences Beijing China |
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| Affiliation: | TUNG,Chen-Ho GUAN,Jing-QuInstitute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China |
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| Abstract: | The photochemical reactions of azobenzene (AB) incorporated into different solvent-swollen Nafion membranes were investigated. The location of azobenzene in water-swollen Nafion membranes was different from that in methanol-swollen Nafion membranes, which was responsible for the different photochemical reactions of AB. In methanol-swollen Nafion membranes only trans-cis isomerization took place, while in water-swollen Nafion membranes photochemical cyclization of AB occurred after rapid trons-cis isomerization. The relation between the relative quantum yields and the light intensity showed that the cyclization was a two-photo process. The numbers of AB molecules per cluster (nAB /cluster) in Nafion membranes with different AB concentrations and different water contents were calculated. Under the experimental condition two competitive photocyclization mechanisms were suggested by nAB /cluster in Nafion membranes, relative quantum yields of the cyclization, and the change of the ratio of benzidine to benzo[c]cinnoline. |
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| Keywords: | Nafion photochemical reaction azobenzene |
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