Fluorescence quenching of the ketocyanine dyes in polar solvents: anti-TICT behavior

被引：59

作者：

Doroshenko, AO

Pivovarenko, VG

机构：

[1] Kharkov VN Karazin Natl Univ, Inst Chem, UA-61077 Kharkov, Ukraine

[2] Kyiv Natl Taras Shevchenko Univ, UA-01033 Kiev, Ukraine

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2003年 / 156卷 / 1-3期

关键词：

ketocyanine dyes; donor-acceptor dialkyl-diarylamino substituted compounds; solvent effects; fluorescence quenching; TICT states;

D O I：

10.1016/S1010-6030(03)00006-6

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：

Spectral properties and fluorescence decay in a series of differently N-substituted ketocyanine dyes belonging to the dibenzalcyclopentanone type were studied in solvents of various polarity and hydrogen bonding ability. The significant solvent-induced fluorescence quenching was explained by the increase of internal conversion rate owing to the lowering of the energy gap between S-1 and S-0 states in polar solvents. The alternative model of non-luminescent TICT states formation was shown to be less probable in the discussed series. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：55 / 64

页数：10

共 39 条

[31] CHARGE SEPARATION IN EXCITED-STATES OF DECOUPLED SYSTEMS - TICT COMPOUNDS AND IMPLICATIONS REGARDING THE DEVELOPMENT OF NEW LASER-DYES AND THE PRIMARY PROCESSES OF VISION AND PHOTOSYNTHESIS [J].