Interaction of ketocyanine dyes with cationic, anionic and neutral micelles

被引：44

作者：

Banerjee, D ^{[1
]}

Das, PK ^{[1
]}

Mondal, S ^{[1
]}

Ghosh, S ^{[1
]}

Bagchi, S ^{[1
]}

机构：

[1] PRESIDENCY COLL, DEPT CHEM, CALCUTTA 700073, W BENGAL, INDIA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1996年 / 98卷 / 03期

关键词：

ketocyanine dyes; cationic micelles; anionic micelles; neutral micelles;

D O I：

10.1016/1010-6030(96)04341-9

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：

Interaction of ketocyanine dyes with cationic (CTAB), anionic (SDS) and neutral (Triton X-100) micelles has been studied by monitoring the polarity-sensitive absorption and fluorescence band of the solute. The position of equilibrium between the bare form of the dye (S-o state) and its hydrogen-bonded complex with water is modified by the micellar medium, the percentage of the hydrogen-bonded species being maximum in SDS, while it is minimum in CTAB. The negative carbonyl centre of the dye avoids the anionic micelle (SDS) and is effectively hydrogen bonded by water. Fluorescence band maximum provides the micropolarity of the micelle-water interface and the local dielectric constant and E(T)(30) value determined agree well with the value for the micellar medium reported in the literature. The possible orientation of the dye in the proximity of the micelle has also been discussed.

引用

页码：183 / 186

页数：4

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