The 1,3-dipolar cycloaddition reaction in the functionalization of carbon nanofibers

Carbon nanofibers were functionalized using a reaction scheme described in the literature for 1,3- dipolar cycloaddition of azomethine ylides generated in situ by the condensation of an -amino acid and an aldehyde. The reagents used were Z-Gly-OH and paraformaldehyde. Their reaction with carbon nano...

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Bibliographic Details
Main Author: Araújo, R. F. (author)
Other Authors: Fernandes, F. M. Braz (author), Proença, M. Fernanda R. P. (author), Silva, Carlos J. R. (author), Paiva, M. C. (author)
Format: article
Language:eng
Published: 2007
Subjects:
Online Access:http://hdl.handle.net/1822/13268
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/13268
Description
Summary:Carbon nanofibers were functionalized using a reaction scheme described in the literature for 1,3- dipolar cycloaddition of azomethine ylides generated in situ by the condensation of an -amino acid and an aldehyde. The reagents used were Z-Gly-OH and paraformaldehyde. Their reaction with carbon nanofibers was studied as a solid mixture by controlled heating in the DSC. An oxazolidinone intermediate was formed as the major product. Z-Gly-OH and paraformaldehyde were also reacted with a model compound (anthracene) in DMF solution leading to the formation of a considerable amount of anthraquinone. These studies suggested that, under the conditions investigated, the 1,3- dipolar cycloaddition reaction was not favoured, and the main result of functionalization was the formation of quinone-type groups as a consequence of an oxidation process.