Photosensitization of colloidal TiO2 with a cyanine dye
Photosensitization of colloidal TiO2 with a cyanine dye
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DOI：
10.1016/s1010-6030(97)00106-8
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发表时间：
1997-09-15
影响因子：
4.3
通讯作者：
Zhou, BM
中科院分区：
文献类型：
--
作者：
Chen, CP;Qi, XY;Zhou, BM
Fluorescence quenching studies have been carried out to elucidate the processes of electron injection from the excited anhydro-1,1'-diethyl-3,3'-disulfobutyl-5,5'-dicyanimidazolo carbocyanine hydroxide (dye) into the conduction band of TiO2 semiconductor colloid. The dye adsorbed strongly on colloidal TiO2 with an apparent association constant of 3478 M-1, and its fluorescence emission was quenched by TiO2 colloid with an efficiency of 92%. Fluorescence lifetime measurements gave the rate constant for the electron injection process from the excited singlet state of the dye into the conduction band of the semiconductor as 4 x 10(9) s(-1). (C) 1997 Elsevier Science S.A.
