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５８０ ｎｍ，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。
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-No 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 410nm was assigned to the dehydrogenated radical, and the absorption at 580nm could be attributed to the transient product of electron transfer process. Whereas 1, 2-NQ in neutral aqueous solution can be monophotonic ionized by 248nm laser,
基金
中国科学院上海原子核所辐化开放实验室资助项目
关键词
1
2-萘醌
1
4-萘醌
动态吸收光谱
激光光解
1,2-NQ,1,4-NQ, Kinetic absorption spectra, Photoionization, Laser photolysis
