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https://hdl.handle.net/20.500.14279/3171
Τίτλος: | PH-potentiometric investigation towards chelating tendencies of p -hydroquinone and phenol iminodiacetate copper(II) complexes | Συγγραφείς: | Stylianou, Marios Keramidas, Anastasios D. Drouza, Chryssoula |
Major Field of Science: | Natural Sciences | Field Category: | Biological Sciences | Λέξεις-κλειδιά: | Complexes;Phenol;Proteins;Enzymes;Copper ions;Potentiometry | Ημερομηνία Έκδοσης: | 8-Ιου-2010 | Πηγή: | Bioinorganic Chemistry and Applications, 2010, vol. 2010, pp. 1-8 | Volume: | 2010 | Start page: | 1 | End page: | 8 | Περιοδικό: | Bioinorganic Chemistry and Applications | Περίληψη: | Copper ions in the active sites of several proteins/enzymes interact with phenols and quinones, and this interaction is associated to the reactivity of the enzymes. In this study the speciation of the Cu 2+ with iminodiacetic phenolate/hydroquinonate ligands has been examined by pH-potentiometry. The results reveal that the iminodiacetic phenol ligand forms mononuclear complexes with Cu 2+ at acidic and alkaline pHs, and a binuclear O phenolate -bridged complex at pH range from 7 to 8.5. The binucleating hydroquinone ligand forms only 2:1 metal to ligand complexes in solution. The pK values of the protonation of the phenolate oxygen of the two ligands are reduced about 2 units after complexation with the metal ion and are close to the pK values for the copper-interacting tyrosine phenol oxygen in copper enzymes | URI: | https://hdl.handle.net/20.500.14279/3171 | ISSN: | 1687479X | DOI: | 10.1155/2010/125717 | Rights: | © Marios Stylianou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | Type: | Article | Affiliation: | University of Cyprus Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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