In this study, a series of benzotriazole (BTz) and tri phenylamine (TPA)-based random copolymers; poly4-(5-P3) were synthesized to investigate the effect of TPA unit and p-bridges on electrochemical and spectroelectrochemical properties of corresponding polymers. The synthesis was carried out via Stille coupling for P1, P3, and Suzuki coupling for P2. Elec-trochemical and spectral results showed that P1 has an ambipolar character, in other words it is both p-type and n-type dopable, whereas P2 and P3 have only p-doping property. Effect of different p-bridges and TPA unit on the HOMO and LUMO energy levels, switching time, and optical contrast were discussed. All polymers are promising materials for electrochromic devices. V C 2013
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