Single wall carbon nanotubes were purchased from Carbon Nanotechnologies Inc., Houston, TX (HiPCo). 2-amino-5-bromo benzophenone[1] and 4-vinylphenylboronic acid was synthesized according to previous reports [2]. 1-Bromo-4-nitrobenzene 99% (Aldrich)
Polymerization of vinylquinoline monomers onto properly modified single-wall carbon nanotubes (SWNT) using atom transfer radical polymerization (ATRP) conditions resulted in efficient grafting of optically active oligomeric chains onto the nanotubes. Two different carbon nanotube (CNT) modification procedures were used, resulting in amino-or hydroxy-functionalized CNTs, which were finally converted to active ATRP initiators. Polymerization of the vinylquinoline monomer resulted in highly soluble oligoquinoline-modified SWNTs. Characterization of these materials was performed using TGA, FT-IR, UV-vis, UV-vis-NIR, and photoluminescence spectroscopies. Immobilization of the quinoline units onto the nanotubes' surface greatly influences their optical behavior as shown explicitly for the case of the protonated analogues. Also, an electron transfer from the excited quinoline units to the SWNT was detected.
Facile routes for the synthesis of hybrid materials consisting of regioregular poly(3-octylthiophene)s covalently attached to single-wall carbon nanotubes are presented for the first time. These materials are easily processable using common organic solvents, and at the same time combine the properties of regioregular poly(3-alkylthiophene)s with those of single-wall carbon nanotubes. Moreover, studies of the properties of these materials have provided strong evidence for an electron transfer from the regioregular poly(3-octylthiophene) to the single-wall carbon nanotube.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.