Alternating copolymers between substituted 1,3,5-triazine (substituent = alkyl or amine) and thiophene or bithiophene are synthesized. The copolymer of amino-1,3,5-triazine with thiophene is soluble in organic solvents, transparent in most parts of the visible region, and photoluminescent. The copolymer receives electrochemical n-doping with an E-pc of -2.08 V vs Ag+/Ag and shows a time-of-flight electron drift mobility of 2.0 x 10(-4) cm(2) center dot V-1 center dot s(-1) which is larger than that of widely used Al(8-quinolinolato)(3).