Solvent effect on the photophysical properties of 4-phenoxy-N-methyl-1,8-naphthalimide

被引：67
|
作者：
Magalhaes, J. L. [1 ]
Pereira, R. V. [1 ]
Triboni, E. R. [1 ]
Berci Filho, P. [1 ]
Gehlen, M. H. [1 ]
Nart, F. C. [1 ]
机构：
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560590 Sao Carlos, SP, Brazil
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2006年 / 183卷 / 1-2期
基金：
巴西圣保罗研究基金会;
关键词：
naphthalimide; solvent effects; photophysical properties;
D O I：
10.1016/j.jphotochem.2006.03.012
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 photophysical properties of N-methyl-1,8-naphthalimide (NI) and 4-phenoxy-N-methyl-1,8-naphthalimide (4-PNI) are studied by steady-state and time-resolved emission measurements. Both absorption and fluorescence spectra are red-shifted when the electron donor phenoxy group (-OPh) is introduced at the C-4 position. Compared to NI, the spectral shift in acetonitrile is 27 and 42 nm for the absorption and fluorescence, respectively. The 4-PNI shows high fluorescence emission in non-polar aprotic solvents that can be ascribed to stabilization of the S, state. The emission intensity of the 4-PNI decreases by addition of water to dioxane solution, and the fluorescence quenching occurs by combination of dynamic and static contribution ascribed to specific solute-solvent interaction. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：165 / 170
页数：6
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