Effect of TiO2 colloids on the fluorescence behavior of two cyanine dyes
文献类型：期刊论文
| 作者 | Guo, CN; Xiang, JF; Feng, J; Tang, YL; Chen, CP; Xu, GZ |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2002-02-15 |
| 卷号 | 246期号:2页码:401-409 |
| ISSN号 | 0021-9797 |
| 关键词 | Cyanine Dye Titanium Dioxide Colloids Photoinduced Electron Transfer |
| DOI | 10.1006/jcis.2001.7912 |
| 英文摘要 | The 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). |
| 语种 | 英语 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| WOS记录号 | WOS:000173783600025 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/79547]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xu, GZ |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：化学研究所
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