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Electrochromic and optical studies of solution processable benzotriazole and fluorene containing copolymers

KAYA, Emine
BALAN, Abidin
BARAN, Derya
Çırpan, Ali
Toppare, Levent Kamil
2-Dodecyl benzotriazole and 9,9-dioctylfluorene containing alternating copolymers poly((9,9-dioctylfluorene)-2,7-diyl-(2-dodecyl-benzo[1,2,3] triazole)) (P1), poly((9,9-dioctylfluorene)- 2,7-diyl-(4,7-bis(thien-2-yl) 2-dodecyl-benzo[1,2,3] triazole)) (P2), poly((9,9-dioctylfluorene)- 2,7-diyl-(4,7-bis(3-hexylthien-5-yl) 2-dodecyl-benzo[1,2,3] triazole)) (P3) were synthesized via Suzuki polycondensation. Electronic and optical properties of resulting polymers showed that all polymers are both p and n dopable and have multicolored electrochromic states. HOMO and LUMO values, band gaps and spectral response of polymers upon externally applied potential and trifluoro acetic acid (TFA) addition were given in detail.