DIMERIC STATES OF 2,7-DIMETHOXY-N-METHYLCARBAZOLE IN TETRAHYDROFURAN AT ROOM-TEMPERATURE

被引：5

作者：

GANGULY, T ^{[1
]}

FARMER, L ^{[1
]}

GRAVEL, D ^{[1
]}

DUROCHER, G ^{[1
]}

机构：

[1] UNIV MONTREAL,DEPT CHIM,CP 6128,SUCC A,MONTREAL H3C 3J7,QUEBEC,CANADA

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 195卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(92)85565-R

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：

It is shown that 2,7-dimethoxy-N-methylcarbazole (DMNMC) dimenzes over a certain concentration range as shown by the law of mass action for the monomer-dimer equilibrium. The dimeric spectrum consists of two branches, an intense one hypsochromic to the monomeric maximum, and a smaller bathochromic branch. The monomers are linked with their molecular planes and chromophores not parallel to each other. The fluorescence lifetime of the monomer goes from 8.1 to 4.6 ns in the dimer, showing that the fluorescence of the dimer is optically allowed. An equilibrium constant (K) equal to 25 dm3 mol-1 at 296 K has been obtained. The dimeric structure prevents the dimer-excimer transformation.

引用

页码：574 / 578

页数：5

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