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- Title
Oligo-viologen/SWCNT nano-composites: Preparation and characterization.
- Authors
Constantin, Veronica-Alina; Cao, Liangcheng; Sadaf, Shamaila; Walder, Lorenz
- Abstract
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.
- Publication
Physica Status Solidi (B), 2012, Vol 249, Issue 12, p2395
- ISSN
0370-1972
- Publication type
Academic Journal
- DOI
10.1002/pssb.201200121