Effect of temperature on the quantum yields of radical ions and triplet states upon fluorescence quenching of pyrene by dibutyl phthalate in acetonitrile and the role of exciplexes in their formation

被引：0

作者：

Weinstein, YA ^{[1
]}

Sadovskii, NA ^{[1
]}

Kuzmin, MG ^{[1
]}

Plyusnin, VF ^{[1
]}

Grivin, VP ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST CHEM KINET & COMBUST,SIBERIAN DIV,NOVOSIBIRSK 630090,RUSSIA

来源：

HIGH ENERGY CHEMISTRY | 1996年 / 30卷 / 06期

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Temperature dependences of quantum yields of pyrene triplet states and radical ions produced on fluorescence quenching of pyrene by dibutyl phthalate in acetonitrile were studied by nanosecond laser photolysis. The apparent activation energy of formation of the radical ions was found to be -2.8 kJ/mol, so that it could not be explained in terms of a luminescence quenching mechanism suggesting complete direct electron transfer. It was shown that the main pathway of formation of pyrene radical ions in the system is the activationless dissociation of the pyrene-dibutyl phthalate exciplex produced upon quenching.

引用

页码：403 / 408

页数：6