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Contribution to the study of the complexation of copper by chitosan and oligomers |
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| Authors: | M Rhazi,J Desbriè res,A Tolaimate,M RinaudoP Vottero,A Alagui |
| Affiliation: | a Laboratoire des Macromolécules Naturelles (LMN), Ecole Normale Supérieure, BP 2400, Marrakech, Morocco b Centre de Recherches sur les Macromolécules Végétales (CERMAV), CNRS, Joseph Fourier University, BP 53, 38041 Grenoble Cedex 9, France c Laboratoire de Chimie Organique Appliquée, Unité Synthèse Organique et Structurale, Faculté des Sciences, Semlalia, BP 2390, Marrakech, Morocco d Laboratoire de Reconnaissance Ionique, Service de Chimie Inorganique et Biologique, Département de Recherches Fondamentales sur la Matière Condensée, CEA-Grenoble, 17, rue des Martyrs, 38054 Grenoble Cedex 9, France |
| Abstract: | The complexation of copper ions by chitosan and its oligomers is investigated using potentiometric and spectrophotometric methods to study the nature of the complexes involved and the role of the degree of polymerisation. Two complexes are demonstrated. Their structure is proposed, the pH range in which they are respectively stable is determined and their stability constants calculated. Finally a degree of polymerisation of 6 appeared as the threshold value for an efficient complexation of copper ions by chitosan oligomers. |
| Keywords: | Chitosan Oligomers Complexation |
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