Araújo R, Fernandes F M, Proença M F, Silva C J R, Paiva M C
Departamento de Engenharia de Polímeros, Instituto de Polímeros e Compósitos, Universidade do Minho, 4800-058 Guimarães, Portugal.
J Nanosci Nanotechnol. 2007 Oct;7(10):3441-5. doi: 10.1166/jnn.2007.815.
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 alpha-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.
采用文献中描述的反应方案对碳纳米纤维进行功能化处理，该方案涉及通过α-氨基酸与醛的缩合原位生成甲亚胺叶立德的1,3-偶极环加成反应。使用的试剂是Z-甘氨酸和多聚甲醛。通过在DSC中控制加热，研究了它们作为固体混合物与碳纳米纤维的反应。形成了恶唑烷酮中间体作为主要产物。Z-甘氨酸和多聚甲醛也在DMF溶液中与模型化合物（蒽）反应，导致形成大量蒽醌。这些研究表明，在所研究的条件下，1,3-偶极环加成反应并不有利，功能化的主要结果是由于氧化过程形成了醌型基团。
