Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 28, Issue 17, Pages 1792-1797Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200700292
Keywords
conjugated polymers; fullerenes; graft copolymers; polythiophenes; radical polymerization; self-assembly
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Poly(3-hexylthiophene) was quantitatively brominated and subsequently used in the Suzuki cross-coupling with a boronic ester of a nitroxide to form a macroinitiator bearing a TEMPO group on each thienyl ring. This macroinitiator initiated the nitroxide-mediated radical polymerization of styrene and 4-chloromethylstyrene (CMS), and subsequently reacted with C-60 to yield soluble graft, rod-coil polymers. Films of the polymers display a bi-continuous phase structure as revealed by AFM. Similar polymers, in which only a fraction of the thienyl units boasted C-60-bearing side chains, displayed optical properties representative of extensive pi-delocalization. The potential application of this methodology for the synthesis of graft polymers for photovoltaic devices is discussed.
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