Synthesis and photophysical properties of 1,4-bis(4,5-diarylimidazol) benzene dyes

被引：14

作者：

Xie, Nan ^{[1
]}

Chen, Yi ^{[1
]}

机构：

[1] Chinese Acad Sci, Lab Organ Optoelect Funct Mat & Mol Engn, Tech Inst Phys & Chem, Beijing 100080, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2007年 / 189卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

1,4-bis(4,5-diarylimidazol)benzenes; fluorescence; two-photon absorption; two-photon fluorescence;

D O I：

10.1016/j.jphotochem.2007.02.008

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：

A class of pi-conjugated 1,4-bis(4,5-diarylimidazol)benzene dyes (1-5) are synthesized, and all dyes exhibit strong fluorescence in solution (phi(f) = 0.96-0.45, in DMSO). It is found that both absorption and fluorescence of dyes are influenced by molecular structures and electronic properties of substitute groups, but little influenced by the polarity of solvents and pH value. Besides, two-photon properties of dyes are also investigated. The largest two-photon absorption cross-section (sigma = 98 GM) for dye 4 is obtained with 700 mn in DMSO, and two-photon fluorescence emission is also observed with 740 nm excitation in solution. (c) 2007 Published by Elsevier B.V.

引用

页码：253 / 257

页数：5

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