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| - Synthesis and Functional Properties of Strongly LuminescentDiphenylamino End-Capped Oligophenylenes
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| - Two novel homologous series of oligophenylenes (OPPs) symmetrically end-capped with diphenylamino groups and asymmetrically end-capped with anthryldiphenylamino groups were successfullysynthesized by a convergent approach with use of palladium-catalyzed homo- and cross-couplingof arylboronic acids. The absorption maxima of both diphenylamino end-capped OPP series do notvary with the chain length although the molar absorptivities increase sequentially. On the otherhand, the emission maxima slightly shift to longer wavelengths when the phenylene unit increasesin the series. All the diphenylamino end-capped oligomers exhibit very large fluorescence quantumyields (81−89%). They also exhibit low first ionization potentials, corresponding to the oxidation ofthe triarylamino moiety, which are essentially unaffected by the oligomeric length extension. Thegood thermal stabilities of these oligomers allowed the fabrication of multilayer light-emittingdevices and their investigations.
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