摘要
研究了苊酮（ＡＮＯ）对９，１０－二氰蒽（ＤＣＡ）的荧光猝灭与激基络合物形成的动力学与机理。基于瞬态荧光双指数衰减，测定了激基络合物的光化学动力学和有关速度常数，论证荧光猝灭作用主要由ＡＮＯ／ＤＣＡ激基络合物的生成以及快速正向电子转移所致。
The kinetics and mechanism of exciplex formation of 9,10-dicyanoanthracene(DCA)by acenaphthenone(ANO) have been studied. The photokinetics of exciplex(ANO/DCA) was determined with transient single-photon counting technique. The measured rateconstants based on biexponential decay reveal that the forward electron transfer(ET) proceeds much faster than the reverse ET and other decay processes while ANO acts as an electron donor.In addition, the diffusion-controlled steady-state fluorescence quenching is mainly caused by ANO/DCA exciplex formation via photoinduced ET.
出处
《高等学校化学学报》
CSCD
北大核心
1996年第4期562-565,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
荧光猝灭
激基络合物
化学动力学
苊酮
二氰蒽
Fluorescence quenching
Exciplex
Pliotoinduced electron transfer mechanism
Kinetics
