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Bošnjaković-Pavlović N, Spasojević-de Biré A, Tomaz I, Bouhmaida N, Avecilla F, Mioč UB, Pessoa JC, Ghermani NE. Electronic Properties of a Cytosine Decavanadate: Toward a Better Understanding of Chemical and Biological Properties of Decavanadates. Inorg Chem 2009; 48:9742-53. [DOI: 10.1021/ic9008575] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nada Bošnjaković-Pavlović
- Laboratoire Structures, Propriétés et Modélisation des Solides (SPMS), UMR CNRS 8580, Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France
- Faculty of Physical Chemistry, University of Belgrade, P.O. Box 47, 11158 Belgrade, PAC 105305, Serbia
| | - Anne Spasojević-de Biré
- Laboratoire Structures, Propriétés et Modélisation des Solides (SPMS), UMR CNRS 8580, Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France
| | - Isabel Tomaz
- Centro de Quimica Estrutural, Instituto Superior Tecnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Nouzha Bouhmaida
- Laboratoire des Sciences des Matériaux (LSM) Université Cadi Ayyad, Faculté des Sciences Semlalia, Boulevard Prince Moulay Abdallah, BP 2390, 40000 Marrakech, Morocco
| | - Fernando Avecilla
- Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Ubavka B. Mioč
- Faculty of Physical Chemistry, University of Belgrade, P.O. Box 47, 11158 Belgrade, PAC 105305, Serbia
| | - João Costa Pessoa
- Centro de Quimica Estrutural, Instituto Superior Tecnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Nour Eddine Ghermani
- Laboratoire Structures, Propriétés et Modélisation des Solides (SPMS), UMR CNRS 8580, Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay-Malabry, France
- Laboratoire de Physique Pharmaceutique, UMR CNRS 8612, Faculté de Pharmacie, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
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Holclajtner-Antunović I, Bajuk-Bogdanović D, Todorović M, Mioč UB, Zakrzewska J, Uskoković-Marković S. Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. CAN J CHEM 2008. [DOI: 10.1139/v08-138] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0, the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5–7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.Key words: heteropolyacids of the Keggin structure, hydrostability, UV, IR and NMR spectroscopy.
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Mioč UB, Petković M, Davidović M, Perić M, Abdul-Redah T. Proton and protonic entities in solid heteropoly compounds: An ab initio calculation of the environmental effect on the ion. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.10.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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