Synthesis and properties of a new poly(arylene ethynylene) containing 1,3,5-triazine units

摘要

A new photoluminescent poly(arylene ethynylene) containing 1,3,5-triazine units was prepared by polycondensation between 2,4-diphenyl-6-N,N-bis(4-bromophenyl)amino-1,3,5-triazine and 1,4-didodecyloxy-2,5-diethynylbenzene using Pd(PPh3)(4) and CuI as the catalysts in the presence of triethylamine. The polymer showed good solubility in common organic solvents and had a number average molecular weight, (M) over bar (n), of 3400, and a weight average molecular weight, (M) over bar (W), of 8100. In toluene the polymer exhibited an intrinsic viscosity eta of 0.11 dL (.) g(-1) at 30 degreesC. The polymer showed photoluminescence (PL) with emission peaks at 479 nm in CHCl3 and at 509 nm in the solid state; quantum yield of the PL in CHCl3 was 21. Electrochemical reduction (or n-doping) of the polymer started at about -2.05 V versus Ag/AgNO3 and gave a peak at -2.30 V versus Ag/AgNO3.