Laser Flash Photolysis Studies on Quinoxalines and Electron-poor Alkenes

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (14): 1293-1298. Previous Articles Next Articles

喹喔啉衍生物与缺电子烯烃的激光闪光光解研究

潘洋, 盛振宇, 李江, 戴静华, 储高升, 俞书勤

中国科学技术大学化学物理系, 中国科学院选键化学重点实验室, 合肥, 230026

投稿日期:2003-12-03 修回日期:2004-03-24 发布日期:2014-02-17
通讯作者: 俞书勤,E-mail:sqyu@ustc.edu.cn E-mail:qyu@ustc.edu.cn
基金资助:
国家自然科学基金(No.20273066)和973计划(No.91999075304)资助项目.

Laser Flash Photolysis Studies on Quinoxalines and Electron-poor Alkenes

PAN Yang, SHENG Zhen-Yu, LI Jiang, DAI Jing-Hua, CHU Gao-Sheng, YU Shu-Qin

Laboratory of Bond-selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026

Received:2003-12-03 Revised:2004-03-24 Published:2014-02-17

Abstract

The photochemistry of quinoxalines 1 and 2 in acetonitrile has been investigated by using time-resolved laser flash photolytical technique.The transient absorption spectra of the excited quinoxalines have been obtained.The self-quenching rate constants (k_sq) of excited triplet states of quinoxalines and the rate constants (k_q) for the reactions between excited triplet states of quinoxalines (1 and 2) and five electron-poor alkenes have been determined respectively by using 266 nm laser at room temperature.In addition, the mechanism of the quenching of transient species has also been suggested.

Key words: quinoxaline, laser flash photolysis, electron-poor alkene, exciplex, photosensitizer

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PAN Yang, SHENG Zhen-Yu, LI Jiang, DAI Jing-Hua, CHU Gao-Sheng, YU Shu-Qin. Laser Flash Photolysis Studies on Quinoxalines and Electron-poor Alkenes [J]. Acta Chimica Sinica, 2004, 62(14): 1293-1298.

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喹喔啉衍生物与缺电子烯烃的激光闪光光解研究

Laser Flash Photolysis Studies on Quinoxalines and Electron-poor Alkenes

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