The photophysical behavior of five acridine(1,8)dione dyes of biological interest was studied by absorption and fluorescence spectroscopy, photoacoustics and time resolved phosphorescence techniques. The results obtained in ethanol and acetonitrile solutions show that the main spectroscopic and photophysical parameters of these compounds depend strongly on both the solvent and oxygen concentrations. Oxygen completely quenched the triplet state of all dyes.
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In nitrogen-saturated solutions, quantum efficiencies of triplet formation in ethanol were lower than those in acetonitrile.For reproduction of material from NJC:Reproduced from Ref. XX with permission from the Centre National de la RechercheScientifique (CNRS) and The Royal Society of Chemistry.For reproduction of material from PCCP:Reproduced from Ref. XX with permission from the PCCP Owner Societies.For reproduction of material from PPS:Reproduced from Ref. XX with permission from the European Society for Photobiology,the European Photochemistry Association, and The Royal Society of Chemistry.For reproduction of material from all other RSC journals and books:Reproduced from Ref. XX with permission from The Royal Society of Chemistry.If the material has been adapted instead of reproduced from the original RSC publication'Reproduced from' can be substituted with 'Adapted from'.In all cases the Ref. XX is the XXth reference in the list of references.If you are the author of this article you do not need to formally request permissionto reproduce figures, diagrams etc.
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