Abstract
A method has been developed to find out total fluorescence quantum yield (ΦF T) of petroleum products like diesel, which provides the overall fluorescence quantum efficiency of a fluorophore at various possible excitation wavelengths. This simple method is suitable for characterization of petroleum products like diesel. The concentration dependent quantitative investigation of PACs present in diesel with respect to variation in ΦF T and red shift of excitation/emission maximum has been studied. The molecular interaction of PACs in fluorophoric mixtures like resonance energy transfer and self-quenching via solvent collision has been explained. Effect of solvent and external quencher molecule on diesel has also been studied. Nitrobenzene is found to be a selective quencher for PACs of diesel.
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