Bispyridinium-phenylene-based copolymers: low band gap n-type alternating copolymers
Author(s)Swager, Timothy Manning; Izuhara, Daisuke
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Bispyridinium-phenylene-based conjugated donor–acceptor copolymers were synthesized by a Stille cross-coupling and cyclization sequence. These polyelectrolytes are freely soluble in organic solvents and display broad optical absorption bands that extend into the near-infrared region. They show ambipolar redox properties with high electron affinities (LUMO levels) of 3.9–4.0 eV as well as high degrees of electroactivity. When reduced (n-doped) these materials display in situ conductivities as high as 180 S/cm. The high conductivity is attributed to the planar structure that is enforced by the cyclic structures of the polymer. The electron affinities are compared to PCBM, a C[subscript 60] based n-type material and hence may find utility in photovoltaic devices.
DepartmentMassachusetts Institute of Technology. Department of Chemistry
Journal of Materials Chemistry
Royal Society of Chemistry
Izuhara, Daisuke, and Timothy M. Swager. “Bispyridinium-phenylene-based Copolymers: Low Band Gap N-type Alternating Copolymers.” Journal of Materials Chemistry 21.11 (2011): 3579.
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