| 光诱导噻吨酮与二苯胺间电子转移反应的溶剂化效应 |
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| 引用本文： | 陈琳,周巧慧,刘香,周晓国,刘世林.光诱导噻吨酮与二苯胺间电子转移反应的溶剂化效应[J].化学物理学报,2015,28(4):493-500. |
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| 作者姓名： | 陈琳 周巧慧 刘香 周晓国 刘世林 |
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| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026,中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026,中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026,中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026,中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026 |
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| 摘 要： | 利用纳秒激光闪光光解技术研究了噻吨酮(TX)和二苯胺(DPA)的光化学反应．在355 nm光激发下，TX的基电子态跃迁至第一激发态进而通过系间窜越生成三重态3TX*. 在乙腈/水混合溶剂中，3TX*与DPA反应体系的瞬态吸收光谱呈现出四个谱峰，分别对应3TX*、TXH·、TX·-和DPA·+的吸收. 随着溶剂极性的增大，这些吸收峰均发生红移. 结合动力学测量，3TX*与DPA的反应机理被证实为电子转移伴随质子转移过程. 3TX*与DPA反应的猝灭速率常数随溶剂极性的增大而缓慢减小，9.7×109 L/(mol·s)(纯乙腈)、8.7×109 L/(mol·s)(乙腈:水=9:1)、8.0×109 L/(mol·s)(乙腈:水=4:1)和7.5×109 L/(mol·s)(乙腈:水=1:1). 质子溶剂-水在此反应中的作用不明显，溶剂的极性对3TX*与DPA电子转移速率的影响不大，表明3TX*的3nπ*和3ππ*三重态吸引DPA中电子的能力相仿.
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| 关 键 词： | 电子转移，质子化，反应机理，吸收光谱，激光闪光光解 |
| 收稿时间： | 2015/3/30 0:00:00 |
Solvent Effect on the Photoinduced Electron Transfer Reaction Between Thioxanthen-9-one and Diphenylamine |
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| Lin Chen,Qiao-hui Zhou,Xiang Liu,Xiao-guo Zhou and Shi-lin Liu.Solvent Effect on the Photoinduced Electron Transfer Reaction Between Thioxanthen-9-one and Diphenylamine[J].Chinese Journal of Chemical Physics,2015,28(4):493-500. |
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| Authors: | Lin Chen Qiao-hui Zhou Xiang Liu Xiao-guo Zhou and Shi-lin Liu |
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| Institution: | Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China,Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China,Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China,Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China and Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | |
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| Keywords: | Electron transfer Protonation Reaction mechanism Absorption spectra Laser flash photolysis |
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