Connors, Robert E.
Lambert, Christopher R.
A carbazolyl-oxazolone derivative dye (4-(9-hexyl-9H-carbazole-3-ylmethylene)-2-(4-nitrophenyl)-4H-oxazol-5-one) belongs to a class of push-pull compounds. Evaluation of the visible absorption and emission properties were carried out in various solvents. The compound showed a strong sensitivity to solvent polarity in the emission spectra, displaying solvent polarity dependent red shifted bands. Lifetime decay and fluorescence quantum yields were recorded showing increasing fluorescence lifetime with increasing polarity. The relative quantum yield reaches a maximum in Tetrahydrofuran. During the study, it was determined that the oxazolone moiety was prone to ring opening reactions, resulting in no charge transfer, with absorption and fluorescence occurring in the carbazole moiety.
Worcester Polytechnic Institute
Major Qualifying Project
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Chemistry and Biochemistry