Synthesis and characterization of polytriphenylamine containing ether bond in the main chain

Four triarylamine monomers that have an ether linkage, bis(N-phenyl-N-4-t-butylphenyl-4-aminophenoxy)ethane (TPAE), bis(N-phenyl-N-4-t-butylphenyl-4-aminophenoxy)butane (TPAB), bis(N-phenyl-N-4-t-butylphenyl-4-aminophenyl)ether (TPAO), and bis(N-4-tolyl-N-1-naphtyl-4-aminophenoxy)ether (NPAO) were prepared and polymerized using iron (III) chloride as an oxidant. Polymers, which are soluble in common organic solvents, were obtained at the yields of higher than 70%, and with glass transition temperatures of higher than 170 °C. The hole mobility decreased in the order of PNPAO > PTPAO > PTPAE = PTPAB > PBTPA, which indicates that the ether oxygen increases mobility.