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Title: Ferntosecond Fluorescence Dynamics of Zinc Biphenylporphine in Nanocrystalline TiO2 Films: Evidence for Interfacial Electron Transfer Through Space
Authors: Lu, Liyang;Chang, Chih-Wei;Lin, Ching-Yao;Diau, Eric Wei-Guang
Contributors: 化學系
Date: 2006-12
Issue Date: 2013-02-05T02:21:15Z
Publisher: Elsevier
Abstract: The femtosecond fluorescence dynamics of zinc biphenylporphine (ZnBPP) were investigated in solution and in two solid-state environments – ZnBPP/glass and ZnBPP/TiO2 – with S2 excitation (λex = 410 nm and λem = 630 nm). Our results indicate that the transient in solution involves a persistent component that becomes completely quenched in thin-film samples; for solid films at least three decay coefficients are required to fit the transients. For ZnBPP/TiO2 films, the fluorescence was quenched significantly through J-type aggregation and interfacial electron transfer (IET) through space. Photocurrent measurements were also performed to confirm the existence of IET through space between ZnBPP molecules and TiO2 nanoparticles.
Relation: Chemical Physics Letters, 432(4-6): 452-456
Appears in Collections:[Department of Chemistry] Periodical Articles

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