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248nm Laser Photolysis Studies of 1, 2- and 1, 4-Naphthaquinone with Kinetic Absorption Spectra
Chen Jiafu,Chu Gaosheng,Xu Xianglin,Zhang Zhicheng,Yao Side
Author NameAffiliation
Chen Jiafu Applied Chemistry Department, University of Science and Technology China, Hefei 230026 
Chu Gaosheng Applied Chemistry Department, University of Science and Technology China, Hefei 230026 
Xu Xianglin Applied Chemistry Department, University of Science and Technology China, Hefei 230026 
Zhang Zhicheng Applied Chemistry Department, University of Science and Technology China, Hefei 230026 
Yao Side Laboratory of Radiation Chemistry, Academia Sinica Shanghai Institute of Nuclear Research, Shanghai 201800 
Abstract:
The characterization of photochemistry of 1, 2- and 1, 4-NQ in neutral aqueous solution was investigated by using 248 nm laser photolysis kinetic absorption spectra equipment.It was found that the maximum absorption peak of 1, 2-NQ and 1,4-NQ cation radical all were around 380nm, but two new species were formed with the decay of 1,4-NQ cation radical with the maximum absorption at 410 and 580nm respectively, data analysis demonstrated that the species with absorption at 410nn was assigned to the dehydrogenated radical, and the absorption at 580 nm could be attributed to the transient product of electron transfer process.Whereas 1,2-NQ in neutral aqueous solution can be monophotonic ionized by 248 nm laser.
Key words:  1,2-NQ, 1,4-NQ, Kinetic absorption spectra, Photoionization, Laserphotolysis
FundProject:中国科学院上海原子核所辐化开放实验室资助项目。
1,2-和1,4-萘醌248 nm激光光解的瞬态吸收光谱研究
陈家富,储高升,徐相凌,张志成,姚思德
摘要:
利用纳秒级激光光解动态吸收光谱装置,研究了1,2-和1,4-萘醌中性水溶液的瞬态吸收光谱。发现1,2-萘醌及1,4-萘醌被光电离后形成的阳离子自由基在380nm均有最大吸收,但1,4-萘醌阳离子自由基在衰变过程中又形成了两种新的活性粒子,它们的最大吸收分别位于410和580nm,分析表明:410nm属于1,4-萘醌脱氢自由基的吸收,而580nm很可能归属由于电子转移而形成的瞬态产物。进一步研究发现,1,2-萘醌在中性水溶液中能被248nm激光单光子电离。
关键词:  1,2-萘醌  1,4-萘醌  动态吸收光谱  光电离  激光光解
DOI:10.1088/1674-0068/13/2/145-148
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