ICCAS OpenIR
Nanosecond time-resolved studies of long-lived photoinduced charge separation in the dyad fluorescein-anthraquinone-methyl ester adsorbed on TiO2 colloids
Zhang, HP; Zhou, YL; Zhang, MH; Shen, T; Xiang, JF; Feng, J
2003-07-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume263Issue:2Pages:669-673
AbstractA dyad composed of fluorescein and 2-methyl-anthraquinone (FL-AQ) was synthesized and its photophysical properties were examined by absorption, fluorescence spectroscopy, and fluorescence lifetime. The charge-separated state formed by photoinduced intramolecular electron transfer was detected by nanosecond transient absorption spectroscopy for the first time. When FL is excited in solution, the photoinduced electron transfer from FL to AQ proceeds efficiently. The rate constant and the efficiency of intramolecular electron transfer are 3.95 x 10(9) s(-1) and 95%, respectively. Its charge-separated state lifetime is too short to detect by transient absorption spectroscopy. Adding nanometer colloidal TiO2 to an FL-AQ ethanol solution prolongs the lifetime of the charge-separated state, so its transient absorption signal is recorded significantly. The lifetimes of FL+. at 480 nm and AQ(-.) at 560 nm in the FL-AQ/TiO2 colloidal system are 11.1 and 8.93 mus, respectively. (C) 2003 Elsevier Inc. All rights reserved.
KeywordPhotoinduced Electron Transfer Fluorescein Anthraquinone Colloidal Tio2 Nanosecond Transient Absorption Spectroscopy
DOI10.1016/S0021-9797(03)00337-0
Indexed BySCI
Language英语
WOS IDWOS:000183927000040
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80352
Collection中国科学院化学研究所
Corresponding AuthorShen, T
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, HP,Zhou, YL,Zhang, MH,et al. Nanosecond time-resolved studies of long-lived photoinduced charge separation in the dyad fluorescein-anthraquinone-methyl ester adsorbed on TiO2 colloids[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2003,263(2):669-673.
APA Zhang, HP,Zhou, YL,Zhang, MH,Shen, T,Xiang, JF,&Feng, J.(2003).Nanosecond time-resolved studies of long-lived photoinduced charge separation in the dyad fluorescein-anthraquinone-methyl ester adsorbed on TiO2 colloids.JOURNAL OF COLLOID AND INTERFACE SCIENCE,263(2),669-673.
MLA Zhang, HP,et al."Nanosecond time-resolved studies of long-lived photoinduced charge separation in the dyad fluorescein-anthraquinone-methyl ester adsorbed on TiO2 colloids".JOURNAL OF COLLOID AND INTERFACE SCIENCE 263.2(2003):669-673.
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