PHENANTHRENE OLEFIN EXCIPLEXES - SUBSTITUENT EFFECTS

被引：6

作者：

MAI, JC ^{[1
]}

CHENG, JY ^{[1
]}

HO, TI ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT CHEM,TAIPEI,TAIWAN

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1992年 / 66卷 / 01期

关键词：

D O I：

10.1016/1010-6030(92)85118-E

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 reductive and oxidative fluorescence quenching of the 3-substituted phenanthrenes (X = H, CN, Cl, Br, CH3, (CH3)2CH, CH3O) by amines, dimethyl fumarate and fumaronitrile were studied. Fluorescent exciplexes are observed for dimethyl fumarate and fumaronitrile systems in benzene at room temperature. The maximum fluorescence energies can be correlated with Rehm and Weller theoretical calculations. The systematic shifts in exciplex energies also correlate linearly with the Hammett-sigma(p) constants. Linear correlations are also observed between the quenching constants k(q) and the Hammett-sigma(p) constants for amine quenching. A simple frontier molecular orbital theory is proposed for the linear correlation of exciplex fluorescence. The effect of the substituent on the lifetime of the exciplexes was also investigated.

引用

页码：53 / 60

页数：8

共 19 条

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