喹喔啉衍生物与缺电子烯烃的激光闪光光解研究

化学学报 ›› 2004, Vol. 62 ›› Issue (14): 1293-1298. 上一篇下一篇

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

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摘要/Abstract

利用时间分辨激光诱导瞬态吸收光谱装置,以一台Nd:YAG激光器四倍频后的266nm激光作为激发光源,详细研究了两种喹喔啉衍生物激发三重态在乙腈体系中的动力学过程,得到激光脉冲作用后不同时间的瞬态吸收光谱及激发三重态自猝灭反应动力学常数.并以五种缺电子烯烃作为猝灭剂,得到了基态缺电子烯烃对喹喔啉衍生物激发三重态的猝灭反应动力学常数,阐明了猝灭反应机理.

关键词: 喹喔啉, 激光闪光光解, 缺电子烯烃, 激基络合物, 光敏剂

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

引用此文

潘洋, 盛振宇, 李江, 戴静华, 储高升, 俞书勤. 喹喔啉衍生物与缺电子烯烃的激光闪光光解研究[J]. 化学学报, 2004, 62(14): 1293-1298.

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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