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Authors
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Paiva, M. C. ; Simon, F. ; Novais, R. M. ; Ferreira, T. ; Proenca, M. F. ; Xu, Wei ; Besenbacher, F.
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Title
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Controlled functionalization of carbon nanotubes by a solvent-free multicomponent approach
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Date
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31.12.2010
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Number
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26384
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Abstract
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The present work reports the solvent-free, one-pot functionalization of multiwall carbon nanotubes (CNTs) based on the 1,3-dipolar cycloaddition of azomethine ylides using N-benzyloxycarbonyl glycine and formaldehyde. The surface morphology of the functionalized CNTs was investigated by scanning tunneling microscopy. The effect of temperature on the reaction was studied by thermogravimetry and X-ray photoelectron spectroscopy (XPS). XPS was a key technique for the detailed chemical analysis of the CNT surface. The formation of two major reaction products was observed, namely a cyclic benzyl carbamate and a pyrrolidine. The concentration of the two products varied with reaction temperature and time. At 180 °C, the main product was the cyclic benzyl carbamate, while at 250 °C the major product was the pyrrolidine. This simple, solvent-free chemical procedure yields CNTs with fine-tuned surface functionality.
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Publisher
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ACS Nano
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Wikidata
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Citation
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ACS Nano 4 (2010) 7379-7386
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DOI
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https://doi.org/10.1021/nn1022523
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Tags
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