1201908-86-2Relevant articles and documents
Poly(3-hexylthiophene)-block-poly(pyridinium phenylene)s: Block polymers of p-and n-type semiconductors
Izuhara, Daisuke,Swager, Timothy M.
scheme or table, p. 2678 - 2684 (2012/03/11)
Conjugated crystalline-crystalline donor-acceptor-donor block copolymer semiconductors, with regioregular poly(3-hexylthiophene) as a donor (p-type) block and poly(pyridinium pheneylene) as an acceptor (n-type) block within the backbone, were produced by sequential Grignard metathesis synthesis of poly(3-hexylthiophene), a Yamamoto-type cross-coupling polymerization- cyclization sequence. These conjugated block copolymers are soluble in organic solvents and display broad optical absorption bands extending close to the near-infrared region. They show reversible ambipolar redox properties with high electron affinities of 3.8-4.0 eV as well as useful ionization potentials of 5.1 eV that are characteristic of the respective blocks. Block copolymers from p- and n-type organic semiconductors are of interest for the formation of nanostructured bulk heterojunctions in photovoltaic devices.
Poly(pyridinium phenylene)s: Water-soluble N-type polymers
Izuhara, Daisuke,Swager, Timothy M.
supporting information; experimental part, p. 17724 - 17725 (2010/04/01)
(Chemical Equation Presented) Poly(pyridinium phenylene) conjugated polymers are synthesized by a cross-coupling and cyclization sequence. These polyelectrolytes are freely soluble in water and display high degrees of electroactivity. When reduced (n-doped) these materials display in situ conductivities as high as 160 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 C60 based n-type material. We find that these polymers undergo excited state electron transfer reactions with other donor conjugated polymers and hence may find utility in photovoltaic devices.