摘要：

Incorporation of hole transporting moieties such as diphenylamine or carbazole into conjugated polymers was achieved. Palladium catalyzed polymerization afforded a series of N-interrupted polyphenyleneethynylenes. Oxidative coupling of 4,4'e-diethynyl-N-hexyldiphenylamine also afforded a high molecular weight diacetylene polymer. These polymers can form flexible free standing film from solution casting. Triphenylaine-based dendrimers were synthesized through Pd-coupling using a repetitive convergent scheme. Electronic properties and photophysics of these polymers were studied. Studies of electron donor-acceptor complexes of these polymers lead to the discovery of a reaction of tetracyanoethylene (TCNE) with electron-rich acetylenes. The reaction is extremely efficient in conversion of electron rich acetylenes to highly polarized donor-acceptor chromophores containing the 1,1,4,4-tetracyanobutadiene-2-yl (TCBD) group as an acceptor. Electronic absorption spectra of these TCBD derivatives imply high molecular polarizabilities as would be expected for such chromophores.

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