STEADY-STATE AND TIME-RESOLVED STUDIES ON THE REDOX BEHAVIOR OF 1,8-NAPHTHALIMIDE IN THE EXCITED-STATE

被引：33

作者：

SAMANTA, A ^{[1
]}

SAROJA, G ^{[1
]}

机构：

[1] UNIV NOTRE DAME,RADIAT LAB,NOTRE DAME,IN 46556

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1994年 / 84卷 / 01期

关键词：

D O I：

10.1016/1010-6030(94)03846-5

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：

The redox behaviour of 1,8-naphthalimide in its first excited singlet state is investigated by steady state and time-resolved studies. Efficient fluorescence quenching of this compound by aromatics and amines is interpreted in terms of a charge transfer mechanism. It is shown that the fluorescence quenching in some cases proceeds through exciplex formation. Weak exciplex emission is seen even in polar solvent such as acetonitrile. Picosecond time-resolved transient absorption studies enables characterization of S1 --> S(n) absorption of the 1,8-naphthalimide compound, and the temporal behaviour of the transient absorption in polar solvents led us to believe that ionic products are exclusively formed from the singlet state. In non-polar solvents, the lack of observation of the ionic products is explained in terms of geminate recombination.

引用

页码：19 / 26

页数：8

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