Two new pi-conjugated polymers containing 1,3,5-triazine units in the main chain, Pa and Pb, are reported. Pa and Pb (R = H and -OCH3, respectively) showed blue photolumineseence emissions with quantum yields of more than 50% in toluene. In the solid state, Pa and Pb showed photoluminescence maximum emission peaks at 479 and 475 nm, respectively. Electrochemically, Pa and Pb showed good stability and reversibility under repeated electrochemical reduction. The polymers had glass-transition temperatures higher than 90 degrees C and had 5 wt % loss temperatures higher than 400 degrees C. (c) 2005 Wiley Periodicals, Inc.