| Texto completo | |
| Autor(es): |
Pereira, Fernanda S.
[1]
;
Nascimento, Heliara D. L.
[2]
;
Magalhaes, Alvicler
[3]
;
Peter, Martin G.
[4]
;
Bataglion, Giovana Anceski
[2]
;
Eberlin, Marcos N.
[2]
;
Gonzalez, Eduardo R. P.
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Paulista, Dept Fis Quim & Biol, Programa Posgrad Ciencia & Tecnol Mat POSMAT, Lab Quim Organ Fina CP 467, BR-19060900 Presidente Prudente - Brazil
[2] Univ Campinas UNICAMP, Inst Quim, Lab ThoMSon Espectrometria Massas, BR-13083970 Campinas, SP - Brazil
[3] Univ Campinas UNICAMP, Inst Quim, Dept Quim Inorgan, BR-13083970 Campinas, SP - Brazil
[4] Univ Potsdam, Inst Chem, D-14476 Golm - Germany
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Molecules; v. 19, n. 11, p. 17604-17618, NOV 2014. |
| Citações Web of Science: | 1 |
| Resumo | |
New N-p-chloro-, N-p-bromo-, and N-p-nitrophenylazobenzylchitosan derivatives, as well as the corresponding azophenyl and azophenyl-p-sulfonic acids, were synthesized by coupling N-benzylvchitosan with aryl diazonium salts. The synthesized molecules were analyzed by UV-Vis, FT-IR, H-1-NMR and N-15-NMR spectroscopy. The capacity of copper chelation by these materials was studied by AAS. Chitosan and the derivatives were subjected to hydrolysis and the products were analyzed by ESI(+)-MS and GC-MS, confirming the formation of N-benzyl chitosan. Furthermore, the MS results indicate that a nucleophilic aromatic substitution (SnAr) reaction occurs under hydrolysis conditions, yielding chloroaniline from N-p-bromo-, and N-p-nitrophenylazo-benzylchitosan as well as bromoaniline from N-p-chloro-, and N-p-nitrophenylazobenzyl-chitosan. (AU) | |
| Processo FAPESP: | 06/51987-6 - Estudo da fixacao e ativacao da molecula de dioxido de carbono com bases nitrogenedas. |
| Beneficiário: | Eduardo Rene Perez Gonzalez |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |