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ABSTRACT Three donor-acceptor copolymers P1, P2, and P3 with N, N′-dodecylpyromellitic diimide as the electron-acceptor unit with three diethynyl-substituted donor monomers: 1,4-diethynyl-2,5- bis(octyloxy)benzene, 2,7-diethynyl-9,9-dioctyl-9H-fluorene, and 3,3′-didodecyl-5,5′-diethynyl-2,2′-bithiophene have been synthesized by Sonogashira crosscoupling polymerization. The synthesized polymers showed deep highest occupied molecular orbital energy levels and larger band gaps (>2.5 eV). Polymers P1, P2, and P3 underwent fluorescence quenching with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), indicating the intermolecular photo-induced charge transfer between the donor polymers and the PCBM acceptor. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1617-1622 [ABSTRACT FROM AUTHOR]

Poly(3-hexylthiophene)- b-poly(3-pentenylthiophene) and poly(3-hexylthiophene)- b-poly(3-undecenylthiophene) diblock copolymers have been synthesized by McCullough method. X-ray diffraction analysis of the diblock copolymers displayed all the reflection peaks specific to regioregular poly(3-hexylthiophene), indicating that the presence of poly(3-alkenylthiophene) block does not affect the packing of the polymer in the solid state. The synthesized diblock copolymers were subjected to hydroboration/oxidation and hydrosilation to demonstrate the reactivity of the alkenyl substituents. Furthermore, poly(3-hexylthiophene)- b-poly(3-pentenylthiophene) was used as a chain transfer agent for the ruthenium-catalyzed ring-opening metathesis polymerization of cyclooctene to generate a polycyclooctene graft copolymer, which was hydrogenated to give poly(3-hexylthiophene)- b-poly(3-pentenylthiophene- g-polyethylene). The opto-electronic properties and the morphology of the synthesized polymers have been investigated. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 [ABSTRACT FROM AUTHOR]