Bulletin of the Chemical Society of Japan · 1995 · 17 citations · 17 references
Natural SciencesChemistryPhysicsInorganic ChemistryQuantum ChemistrySpectroscopyFluorescence SpectroscopyHeterocyclic ChemistryLaser SpectroscopyLuminescent MaterialsMolecular Excited StatesPhotochemistryEmission Spectra AnalysisExcited StatesFluorescence Emission SpectraFluorescence LifetimeFluorescent DyesFluorophore PhotophysicsStructure-property Relationships In DyesSubstitutions
Abstract Due to their very substantial fluorescence emission, pyrylium and thiopyrylium salts are widely used as laser dyes and photosensitizers. This paper deals with the fluorescence properties (quantum yields and wavelengths of the fluorescence maxima as well as the lifetimes of the singlet excited states) of eight pyrylium and ten thiopyrylium salts, with special emphasis on the effect of α and γ substitutions of the heterocycle.
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