Copolymer-Controlled Diameter-Selective Dispersion of Semiconducting Single-Walled Carbon Nanotubes

Autor:	Nicolas Berton, Manfred M. Kappes, Frank Hennrich, Marcel Mayor, Ninette Stürzl, Jana Tittmann, Fabien Lemasson
Rok vydání:	2011
Předmět:	chemistry.chemical_classification Anthracene Materials science Carbazole General Chemical Engineering General Chemistry Polymer Carbon nanotube Fluorene Anthraquinone law.invention chemistry.chemical_compound chemistry law Polymer chemistry Materials Chemistry Copolymer Bifunctional
Zdroj:	Chemistry of Materials. 23:2237-2249
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm200275v
Popis:	The ability of a series of strictly alternating copolymers to selectively enwrap single-walled carbon nanotubes (SWNTs) is investigated. Seven copolymers comprising either fluorene or carbazole subunits separated by naphthalene, anthracene, and anthraquinone spacers are obtained in good yields via a Suzuki cross-coupling protocol. The 1,5-linked naphthalene, anthracene, and anthraquinone units are introduced to favor a spiral conformation of the polymer backbone in order to improve its SWNT wrapping features. Particularly high yields of polymers are obtained using the naphthalene-1,5-ditriflate precursor, highlighting the potential of bifunctional aryltriflates as precursors of copolymers. All polymers disperse HiPco SWNTs in toluene. The obtained dispersions are purified by density gradient centrifugation and their compositions are analyzed by photoluminescence (PL) spectroscopy. In their dispersing ability the polymers display more or less pronounced SWNT diameter selectivity. In particular, poly(9,9-di...
Databáze:	OpenAIRE
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