Synthesis Of Benzothiadiazole Dicarboxylic Imide- And Benzotriazole Dicarboxylic Imide-based Polymers

Three donor-acceptor (D-A) alternating copolymers and one terpolymer were synthesized, using N-dodecyl-4,7-di(5-bromothiophen-2-yl)-2,1,3-benzothiadiazole-5,6-dicarboxylic imide (77), 4,8-bis(5-bromothiophen-2-yl)-6-dodecyl-2-octyl-[1,2,3]triazolo[4,5-f]isoindole-5,7(2H,6H)-dione (80), 4,8-bis(5-bromothiophen-2-yl)-6-dodecyl-2-(2-ethylhexyl)-[1,2,3]triazolo[4,5-f]isoindole-5,7(2H,6H)-dione (81), 4,8-bis(5-bromothiophen-2-yl)-2,6-didodecyl-[1,2,3]triazolo[4,5-f]isoindole-5,7(2H,6H)-dione (82) and 1,3-bis(5-bromothiophen-2-yl)-5,7-bis(2-ethylhexyl)-4H,8H-benzo[1,2-c:4,5-c']dithiophene-4,8-dione (85) as electron deficient moieties and 4,8-bis(4,5-dioctylthiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2,6-diyl)bis(trimethylstannane (83) and (4,8-bis(4-((2-ethylhexyl)oxy)-3-fluorophenyl)benzo[1,2-b:4,5-b']dithiophene-2,6-diyl)bis(trimethylstannane) (84) as electron rich moiety, by using Stille coupling polycondensation polymerization reaction. The resulting polymers have good solubility in chloroform and/or o-DCB. These polymers were characterized by using UV-vis spectroscopy and cyclic voltammetry.

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