Time-resolved evanescent wave induced fluorescence spectroscopy: Part 1. - Deviations in the fluorescence lifetime of tetrasulphonated aluminium phthalocyanine at a fused silica/methanol interface

Gary Rumbles, Alan J. Brown, David Phillips

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29 Citations (Scopus)

Abstract

Evanescent wave induced fluorescence spectroscopy and time-correlated single-photon counting have been combined to provide a method of studying the fluorescence decay profiles of fluorophores at a solid/solution interface. Using these techniques the photophysical properties of tetrasulphonated aluminium phthalocyanine (AlS4Pc) in methanol and water solution have been studied at a fused silica interface. In a poor solvent, such as methanol, AlS4Pc is shown to form an adsorbed monolayer on the fused silica surface and exhibit a fluorescence decay profile that deviates from the simple, first-order, single-exponential kinetics of the bulk solution. By changing the solvent to water, which is a good solvent for AlS4Pc, the surface/bulk differences are not observed. The ability of time-resolved fluorescence spectroscopy to distinguish between concentration and quantum-yield effects on evanescent wave induced fluorescence intensity, is clearly demonstrated.

Original languageEnglish
Pages (from-to)825-830
Number of pages6
JournalJournal of the Chemical Society - Faraday Transactions
Volume87
Issue number6
DOIs
Publication statusPublished - 1991

Fingerprint

evanescent waves
Fluorescence spectroscopy
Fused silica
Methanol
methyl alcohol
Fluorescence
silicon dioxide
aluminum
deviation
life (durability)
fluorescence
spectroscopy
Fluorophores
Water
Quantum yield
Solid solutions
Monolayers
Photons
decay
profiles

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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title = "Time-resolved evanescent wave induced fluorescence spectroscopy: Part 1. - Deviations in the fluorescence lifetime of tetrasulphonated aluminium phthalocyanine at a fused silica/methanol interface",
abstract = "Evanescent wave induced fluorescence spectroscopy and time-correlated single-photon counting have been combined to provide a method of studying the fluorescence decay profiles of fluorophores at a solid/solution interface. Using these techniques the photophysical properties of tetrasulphonated aluminium phthalocyanine (AlS4Pc) in methanol and water solution have been studied at a fused silica interface. In a poor solvent, such as methanol, AlS4Pc is shown to form an adsorbed monolayer on the fused silica surface and exhibit a fluorescence decay profile that deviates from the simple, first-order, single-exponential kinetics of the bulk solution. By changing the solvent to water, which is a good solvent for AlS4Pc, the surface/bulk differences are not observed. The ability of time-resolved fluorescence spectroscopy to distinguish between concentration and quantum-yield effects on evanescent wave induced fluorescence intensity, is clearly demonstrated.",
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AU - Rumbles, Gary

AU - Brown, Alan J.

AU - Phillips, David

PY - 1991

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N2 - Evanescent wave induced fluorescence spectroscopy and time-correlated single-photon counting have been combined to provide a method of studying the fluorescence decay profiles of fluorophores at a solid/solution interface. Using these techniques the photophysical properties of tetrasulphonated aluminium phthalocyanine (AlS4Pc) in methanol and water solution have been studied at a fused silica interface. In a poor solvent, such as methanol, AlS4Pc is shown to form an adsorbed monolayer on the fused silica surface and exhibit a fluorescence decay profile that deviates from the simple, first-order, single-exponential kinetics of the bulk solution. By changing the solvent to water, which is a good solvent for AlS4Pc, the surface/bulk differences are not observed. The ability of time-resolved fluorescence spectroscopy to distinguish between concentration and quantum-yield effects on evanescent wave induced fluorescence intensity, is clearly demonstrated.

AB - Evanescent wave induced fluorescence spectroscopy and time-correlated single-photon counting have been combined to provide a method of studying the fluorescence decay profiles of fluorophores at a solid/solution interface. Using these techniques the photophysical properties of tetrasulphonated aluminium phthalocyanine (AlS4Pc) in methanol and water solution have been studied at a fused silica interface. In a poor solvent, such as methanol, AlS4Pc is shown to form an adsorbed monolayer on the fused silica surface and exhibit a fluorescence decay profile that deviates from the simple, first-order, single-exponential kinetics of the bulk solution. By changing the solvent to water, which is a good solvent for AlS4Pc, the surface/bulk differences are not observed. The ability of time-resolved fluorescence spectroscopy to distinguish between concentration and quantum-yield effects on evanescent wave induced fluorescence intensity, is clearly demonstrated.

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