Femtosecond fluorescence dynamics of zinc biphenylporphine in nanocrystalline TiO2 films: Evidence for interfacial electron transfer through space

Liyang Luo, Chih-Wei Chang, Ching Yao Lin, Eric Wei Guang Diau

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)452-456
Number of pages5
JournalChemical Physics Letters
Volume432
Issue number4-6
DOIs
Publication statusPublished - 2006 Dec 11

Fingerprint

Zinc
electron transfer
zinc
Fluorescence
fluorescence
Electrons
Photocurrents
photocurrents
Agglomeration
Nanoparticles
solid state
Glass
Thin films
nanoparticles
Molecules
glass
decay
coefficients
thin films
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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title = "Femtosecond fluorescence dynamics of zinc biphenylporphine in nanocrystalline TiO2 films: Evidence for interfacial electron transfer through space",
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.",
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Femtosecond fluorescence dynamics of zinc biphenylporphine in nanocrystalline TiO2 films : Evidence for interfacial electron transfer through space. / Luo, Liyang; Chang, Chih-Wei; Lin, Ching Yao; Diau, Eric Wei Guang.

In: Chemical Physics Letters, Vol. 432, No. 4-6, 11.12.2006, p. 452-456.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Femtosecond fluorescence dynamics of zinc biphenylporphine in nanocrystalline TiO2 films

T2 - Evidence for interfacial electron transfer through space

AU - Luo, Liyang

AU - Chang, Chih-Wei

AU - Lin, Ching Yao

AU - Diau, Eric Wei Guang

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AB - 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.

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