No abstract

Novel triphenylamine-based linear, hyperbranched and branched conjugated polyazomethines have been synthesized by free-catalyst solution polycondensation of 1,4-diaminobenzene with 4,4 -diformyl triphenylamine, 4,4 ,4 -triformyl triphenylamine and their mixture in different molar ratios. Linear polyazomethine has a good solubility in organic solvents while branched and hyperbranched polymers are partially soluble. A wholly soluble hyperbranched polyazomethine was obtained by end-capping of polymer at gelation point using a monofunctional aromatic amine, p-anisidine. Characterization of all polymers was made by 1 H-NMR, FT-IR and UV-Vis and photoluminescence spectroscopy and thermal methods. Electrochemical behavior of polymers was studied by cyclic voltammetry using thin films cast from THF solution on a platinum disc working electrode in acetonitrile solvent and tetrabutylammonium tetrafluoroborate as electrolyte.

Novel hyperbranched conductive copolymers containing 4,4 1 ,4 11 trisubstituted triphenylamine and 2,7-(9,9 1 -dioctyl)fluorenyl or 2,5-thienyl moieties were synthesized by palladium catalyzed crosscoupling reaction of bis boronic acids of fluorene or thiophene with tris(4-iodophenyl)amine, in an onestep process. The copolymers were obtained as fully or partially soluble materials in chlorinated or aprotic polar solvents, depending on the monomer structure and concentration and polycondensation time, and were characterized by Fourier transform infrared, 1 H-NMR, UV-vis and fluorescence spectroscopy.