Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/13112
Título: | Controlled functionalization of carbon nanotubes by a solvent-free multicomponent approach |
Autor(es): | Paiva, M. C. Simon, Frank Novais, R. M. Ferreira, Tânia Proença, M. Fernanda R. P. Wei Xu Besenbacher, F. |
Palavras-chave: | Carbon nanotube Chemical functionalization X-ray photoelectron spectroscopy Thermogravimetry Scanning tunneling microscopy |
Data: | 2010 |
Editora: | American Chemical Society |
Revista: | ACS Nano |
Resumo(s): | 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/13112 |
DOI: | 10.1021/nn1022523 |
ISSN: | 1936-0851 |
Versão da editora: | http://pubs.acs.org/ |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ACS_Nano,_2010,_4_(12),_pp_7379–7386.pdf Acesso restrito! | Documento principal | 3,04 MB | Adobe PDF | Ver/Abrir |