Interaction of chitosan and chitin with Ni, Cu and Zn ions: a computational study

Jose R. B. Gomes, Miguel Jorge, Paula Gomes

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The interaction of chitosan and chitin with monovalent and divalent late transition metal ions was studied by means of density functional theory. The calculations were performed at the B3LYP/6-31+G** level of theory using glucosamine and N-acetylglucosamine monomers as models of chitosan and chitin, respectively, in the absence and in the presence of a few water molecules. The calculations suggest that N-acetylglucosamine is more acidic than glucosamine and that the most stable metal complexes with each of these two molecules have similar
stabilities. In the case of the interaction of these two molecules with monovalent cations, the most stable complexes are those with Ni(I). In the case of the divalent cations, complexes with Cu(II) are more favorable, which is in good agreement with the available experimental data.
Original languageEnglish
Pages (from-to)121-129
Number of pages9
JournalJournal of Chemical Thermodynamics
Volume73
DOIs
Publication statusPublished - 2014

Keywords

  • thermochemistry
  • enthalpy of interation
  • bond dissociation enthalpy
  • gas-phase acidity
  • metal complex

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