ICCAS OpenIR
Effect of TiO2 colloids on the fluorescence behavior of two cyanine dyes
Guo, CN; Xiang, JF; Feng, J; Tang, YL; Chen, CP; Xu, GZ
2002-02-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume246Issue:2Pages:401-409
AbstractThe photophysical properties of two typical cyanine dyes [3,3'-diethyl-9-methyl-thiacarbocyanine iodide (dye A) and anhydro-3,3'-disulfopropyl-5,5'-diphenyl-9-ethyloxacarbocyanine hydroxide (dye B)] in the absence and presence of TiO2 colloids have been investigated by UV-visible spectroscopy, H-1-NMR spectroscopy, fluorescence spectroscopy, fluorescence lifetime measurements, and ESR measurements. It was found from the absorption spectra and NMR results that there are two isomers in the ground state of these dyes. Steady-state fluorescence spectra show that the fluorescence intensities of dye A and dye B are enhanced and quenched by TiO2 colloids, respectively. Time-resolved fluorescence lifetime measurements indicate that the lifetimes of dye A and dye B in the presence of TiO2 colloids are longer and shorter than those obtained in the absence of TiO2 colloids, respectively. ESR measurements demonstrate that the electron transfer efficiency from (1)dye B* to the conduction band of TiO2 is much larger than that from (1)dye A* to the conduction band of TiO2. The different fluorescence behavior of dye A and dye B can be intepreted in terms of whether phi(Tr,nr)(0) - phi(Tr,nr) (the reduction of the quantum yield for radiationless transition in the excited singlet state (1)dye* caused by the TiO2 colloids) is larger or smaller than phi(ET) (the quantum yield of electron transfer from (1)dye* to the conduction band of TiO2 colloids). (C) 2002 Elsevier Science (USA).
KeywordCyanine Dye Titanium Dioxide Colloids Photoinduced Electron Transfer
DOI10.1006/jcis.2001.7912
Indexed BySCI
Language英语
WOS IDWOS:000173783600025
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79548
Collection中国科学院化学研究所
Corresponding AuthorXu, GZ
Affiliation1.Acad Sinica, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Ctr Mol Sci, Beijing 100080, Peoples R China
2.Acad Sinica, Tech Inst Phys & Chem, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Guo, CN,Xiang, JF,Feng, J,et al. Effect of TiO2 colloids on the fluorescence behavior of two cyanine dyes[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2002,246(2):401-409.
APA Guo, CN,Xiang, JF,Feng, J,Tang, YL,Chen, CP,&Xu, GZ.(2002).Effect of TiO2 colloids on the fluorescence behavior of two cyanine dyes.JOURNAL OF COLLOID AND INTERFACE SCIENCE,246(2),401-409.
MLA Guo, CN,et al."Effect of TiO2 colloids on the fluorescence behavior of two cyanine dyes".JOURNAL OF COLLOID AND INTERFACE SCIENCE 246.2(2002):401-409.
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