Alternatively linking fullerene and conjugated polymers
Résumé
The stereo-electronic control over bisadditions of conjugated polymers to fullerene (C60) is explored in the formation of alternating copolymers. The chemistry, resulting configuration, and properties of poly(3-hexylthiophene)- alt-C60 copolymers prepared by either classic pyrrolidine ring formation or an atom transfer radical addition are compared. Both routes result in controlled additions of polymers to C60. Extensive macromolecular modeling through PM6 methods indicate that there is no conjugation between P3HT and C60 in the systems studied. This along with 2D-NMR, AFM, and photovoltaic characterizations of the materials indicate the importance of the structure of the modified C60 and the nature of the linking group between C60 and P3HT segments in determining the morphology of the copolymers in the solid state. © 2009 Wiley Periodicals, Inc.
Mots clés
AFM
Alternating copolymer
Atom transfer radical addition
Carrier mobility
Computer modeling
Computer simulation
conjugated polymers
Copolymerization
Copolymers
Electronic controls
Electronics industry
Free radical reactions
Fullerenes
Linking groups
Organic polymers
Photovoltaic effects
Poly(3-hexylthiophene)
Polymer photovoltaic devices
Polymers
Power electronics
Pyrrolidine rings