Fluorescence Study of Dehydroabietic Acid-Based Bipolar Arylamine-Quinoxalines
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The absorption and fluorescence spectra, lifetimes and quantum yields of a series of triarylaminequinoxaline bipolar compounds, with and without the bulky dehydroabietic acid group, have been studied in toluene solution. This bulky group is introduced to improve solubility and thermal properties of these systems. It is shown that this does not affect their spectral or photophysical behavior. The compounds show relatively strong fluorescence, with the emission maximum strongly dependent upon the substituents present. Oxidation potentials have also been determined in acetonitrile solution, and again indicate that introduction of the resin acid moiety has no effect on these properties.
KEY WORDS:Fluorescence triarylamines quinoxalines dehydroabietic acid
We thank the Programa Operacional Ciência, Tecnologia, Investigação (POCTI), Fundação para a Ciência e a Tecnologia (FCT) and the Fundo Europeu de Desenvolvimento Regional (FEDER) for financial support. One of us (SMF) thanks FCT for the award of a Postdoctoral Fellowship.
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