Oligo-viologen/SWCNT nano-composites: Preparation and characterization

Autor(en): Constantin, Veronica-Alina
Cao, Liangcheng
Sadaf, Shamaila
Walder, Lorenz 
Stichwörter: electrochemistry; FUNCTIONALIZATION; nano-composites; Physics; Physics, Condensed Matter; STM; SWCNT; viologen; WALL CARBON NANOTUBES
Erscheinungsdatum: 2012
Herausgeber: WILEY-V C H VERLAG GMBH
Journal: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volumen: 249
Ausgabe: 12
Startseite: 2395
Seitenende: 2398
Zusammenfassung: 
The synthesis and characterization of two types of viologen polymer modification of semiconducting carbon nanotubes (poly-I-CNT and poly-II-CNT) are described. The monomer I is a large three-arm star-shaped compound consisting of three benzyl and three phenyl viologen subunits. Electrochemical polymerization via benzylic radical formation was used. The star arms in poly-I-CNT are well-resolved structures in two-dimensional crystallized fashion (from STM), pointing to self-assembling prior to polymerization. Besides being completely surface covered, individual SWCNTs are interconnected with the polymer in the poly-I-CNT composite material. Poly-II-CNT was prepared by chemical reduction of N'-methyl-N-aminophenyl viologens. Repetitive viologen oligomer brushes are observed along the SWCNT after polymerization. The functionalization is confirmed by XPS, electrochemistry, and Raman spectroscopy. [GRAPHICS] . (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN: 03701972
DOI: 10.1002/pssb.201200121

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