Photophysics of aggregated 9-methylthiacarbocyanine bound to polyanions

被引：20

作者：

Chibisov, AK ^{[1
]}

Görner, H ^{[1
]}

机构：

[1] Max Planck Inst Strahlenchem, D-45413 Mulheim, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 357卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(02)00531-6

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：

The photophysical properties of 3,3'-diethyl-9-methylthiacarbocyanine (DTC) were studied in the presence of polystyrene sulfonate (PSS), polyacrylic acid (PAA) and polymethacrylic acid (PMA). The absorption spectra reflect a monomer/dimer equilibrium in neat aqueous solution and a shift towards bound H-aggregates. bound dimers and bound monomers on increasing the ratio of polyanion residue to dye concentrations (r). These equilibria also determine the photodeactivation modes of DTC. The fluorescence intensity is reduced, when dimers and aggregates are present and strongly enhanced for low dye loading (r = 10(4)). In contrast. the quantum yield of intersystem crossing is enhanced for bound dimers (r = 10(3)). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：434 / 439

页数：6