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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
18/02/2016 |
Data da última atualização: |
03/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SOUZA, N. L. G. D.; SALLES, T. F.; BRANDAO, H. de M.; EDWARDS, H. G. M.; OLIVEIRA, L. F. C. de. |
Afiliação: |
Nelson L. G. D. Souza, UFJF; Tamyres F. Salles, UFJF; HUMBERTO DE MELLO BRANDAO, CNPGL; Howell G. M. Edwards, University of Bradford; Luiz F. C. de Oliveira, UFJF. |
Título: |
Synthesis, Vibrational Spectroscopic and Thermal Properties of Oxocarbon Cross?Linked Chitosan. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 26, n. 6, p. 1247-1256, 2015. |
Idioma: |
Inglês |
Conteúdo: |
In this work specimens of chitosan which have been cross-linked covalently and ionically with different oxocarbon and pseudo-oxocarbon anions have been synthesised and characterized using infrared and Raman spectroscopic techniques, solid state 13C nuclear magnetic resonance (NMR) and by thermogravimetry. According to the spectroscopic and thermal results, ionically crosslinked chitosans are obtained with squarate, croconate and rhodizonate ions as crosslinking agents, whereas covalently crosslinked chitosan can be obtained when squaric acid is used as the crosslinking agent; the same products are not observed when the pseudo-oxocarbon anion croconate violet is used, which can be attributed to the low basic strength of the crosslinking species. |
Palavras-Chave: |
Infrared and Raman; Oxocarbon; Solid state 13C NMR. |
Thesaurus Nal: |
chitosan; crosslinking. |
Categoria do assunto: |
W Química e Física |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139397/1/Cnpgl-2015-JBrasChemSoc-Synthesis.pdf
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Marc: |
LEADER 01463naa a2200229 a 4500 001 2037647 005 2024-02-03 008 2015 bl uuuu u00u1 u #d 100 1 $aSOUZA, N. L. G. D. 245 $aSynthesis, Vibrational Spectroscopic and Thermal Properties of Oxocarbon Cross?Linked Chitosan.$h[electronic resource] 260 $c2015 520 $aIn this work specimens of chitosan which have been cross-linked covalently and ionically with different oxocarbon and pseudo-oxocarbon anions have been synthesised and characterized using infrared and Raman spectroscopic techniques, solid state 13C nuclear magnetic resonance (NMR) and by thermogravimetry. According to the spectroscopic and thermal results, ionically crosslinked chitosans are obtained with squarate, croconate and rhodizonate ions as crosslinking agents, whereas covalently crosslinked chitosan can be obtained when squaric acid is used as the crosslinking agent; the same products are not observed when the pseudo-oxocarbon anion croconate violet is used, which can be attributed to the low basic strength of the crosslinking species. 650 $achitosan 650 $acrosslinking 653 $aInfrared and Raman 653 $aOxocarbon 653 $aSolid state 13C NMR 700 1 $aSALLES, T. F. 700 1 $aBRANDAO, H. de M. 700 1 $aEDWARDS, H. G. M. 700 1 $aOLIVEIRA, L. F. C. de 773 $tJournal of the Brazilian Chemical Society$gv. 26, n. 6, p. 1247-1256, 2015.
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Embrapa Gado de Leite (CNPGL) |
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1. | | SOUZA, N. L. G. D.; SALLES, T. F.; BRANDAO, H. de M.; EDWARDS, H. G. M.; OLIVEIRA, L. F. C. de. Synthesis, Vibrational Spectroscopic and Thermal Properties of Oxocarbon Cross?Linked Chitosan. Journal of the Brazilian Chemical Society, v. 26, n. 6, p. 1247-1256, 2015.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Gado de Leite. |
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