FLUORESCENCE QUENCHING OF ANTHRACENES BY N,N-DIMETHYLANILINE - COMPARISON WITH QUENCHING BY TRIPHENYLPHOSPHINE

被引：13

作者：

MARCONDES, MER ^{[1
]}

TOSCANO, VG ^{[1
]}

WEISS, RG ^{[1
]}

机构：

[1] GEORGETOWN UNIV,DEPT CHEM,WASHINGTON,DC 20057

来源：

JOURNAL OF PHOTOCHEMISTRY | 1979年 / 10卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/0047-2670(79)80020-9

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：

Rate constants kq for fluorescence quenching by N,N-dimethylaniline (DMA) of eleven anthracenes (Ai) substituted at the 9 or 9, 10 positions have been measured in benzene and acetonitrile. The results are compared with kq obtained for the anthracenes with triphenylphosphine (P) as quencher. Emissions in benzene were observed for the exciplexes between DMA and A4 - A11. The data are correlated with physical constants for Ai, DMA, P and solvent according to the charge-transfer model of Weller and the excitation-resonance model of Hammond. It is shown that neither theory can explain all of the data. It is suggested that the Ai-DMA and Ai-P exciplexes may be of different geometries. © 1979.

引用

页码：315 / 327

页数：13

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[41] EXCIPLEX FORMATION IN POLAR SOLVENTS [J].