Photosensitization of nanocrystalline TiO2 electrodes by squarylium cyanine incorporated with a ruthenium bipyridyl complex

被引：15

作者：

Zhang, DS

Wang, WB

Liu, Y

Xiao, XR ^{[1
]}

Zhao, W

Zhang, BW

Cao, Y

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Inst Photog Chem, Beijing 100101, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2000年 / 135卷 / 2-3期

关键词：

photosensitization; squarylium cyanine; ruthenium bipyridyl complex; nanocrystalline TiO2 electrodes; photoelectric response;

D O I：

10.1016/S1010-6030(00)00291-4

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：

Photosensitization of nanocrystalline TiO2 electrodes by adsorbing squarylium cyanine (SQ) and a mixture of squarylium cyanine and ruthenium bipyridyl complex (RuL2(NCS)(2)) has been investigated. Photocurrent generation from the monomers and H-type aggregates of squarylium cyanine were observed in the action spectra of squarylium cyanine sensitized electrodes. Adsorption of mixtures of squarylium cyanine and ruthenium bipyridyl complex on nanocrystalline TiO2 electrodes was studied by absorption and infrared spectra. An association effect of photosensitization was observed in mixtures with molar proportions (SQ:RuL2(NCS)(2)) of 1:20, 1:50 and 1:100 mol/mol, resulting in the increase of the photoelectric response. Electron transfer mechanism was suggested in terms of quenching the fluorescence of squarylium cyanine by the presence of ruthenium bipyridyl complex and TiO2 colloids. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：235 / 240

页数：6

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