Authors Kaul, E. ; Senkovsky, V. ; Tkachov, R. ; Bocharova, V. ; Komber, H. ; Stamm, M. ; Kiriy, A.
Title Synthesis of a bifunctional initiator for controlled kumada catalyst-transfer polycondensation/Nitroxide-mediated polymerization and preparation of poly(3-hexylthiophene)-polystyrene block copolymer therefrom
Date 12.01.2010
Number 22763
Abstract Herein, we present a new approach to synthesize rod-coil block copolymers via consecutive Kumada catalyst-transfer polycondensation (KCTP) and nitroxide-mediated free radical polymerization (NMP) performed from a bifunctional initiator, TIPNO-Ph-Ni(dppp)-Br (TIPNO = 2,2,5-trimethyl-4-phenyl-3-azahexane-3-nitroxide; dppp = propane-1,3-diylbis(diphenylphosphane). The utility of the method was exemplified in a preparation of a model block copolymer, poly(3-hexylthiophene)-block-polystyrene (P3HT-b-PS) with a relatively narrow molecular weight distribution of 1.33. Synthesis of the bifunctional initiator was accomplished by a reaction of diethylbipyridylnickel with a readily accessible precursor, TIPNO-Ph-Br, followed by in situ replacement of the bipyridyl ligand onto bidentate phosphorus one.
Publisher Macromolecules
Citation Macromolecules 43 (2010) 77-81
Tags chain-growth polymerization controlled molecular-weight regioregular polythiophene solar-cells polydispersity poly(3-alkylthiophenes) poly(p-phenylene) polyfluorene mechanism diblock

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