Isomerically Pure α1-Monosubstituted Tungstodiphosphates: Synthesis, Characterization and Stability in Aqueous Solutions

European Journal of Inorganic ChemistryVolume 2002, Issue 10 p. 2587-2593 Full Paper Isomerically Pure α1-Monosubstituted Tungstodiphosphates: Synthesis, Characterization and Stability in Aqueous Solutions Roland Contant, Roland Contant Laboratoire de Chimie des Métaux de Transition, UMR 7071, CNRS, Université Paris VI, 4, place Jussieu, 75252 Paris Cedex 05, FranceSearch for more papers by this authorMartine Richet, Martine Richet Laboratoire de Chimie des Métaux de Transition, UMR 7071, CNRS, Université Paris VI, 4, place Jussieu, 75252 Paris Cedex 05, FranceSearch for more papers by this authorYu Wei Lu, Yu Wei Lu Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this authorBineta Keita, Bineta Keita Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this authorLouis Nadjo, Louis Nadjo [email protected] Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this author Roland Contant, Roland Contant Laboratoire de Chimie des Métaux de Transition, UMR 7071, CNRS, Université Paris VI, 4, place Jussieu, 75252 Paris Cedex 05, FranceSearch for more papers by this authorMartine Richet, Martine Richet Laboratoire de Chimie des Métaux de Transition, UMR 7071, CNRS, Université Paris VI, 4, place Jussieu, 75252 Paris Cedex 05, FranceSearch for more papers by this authorYu Wei Lu, Yu Wei Lu Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this authorBineta Keita, Bineta Keita Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this authorLouis Nadjo, Louis Nadjo [email protected] Laboratoire de Chimie Physique, UMR 8000, CNRS, Electrochimie et Photoélectrochimie, Université Paris-Sud, Bâtiment 420, 91405 Orsay Cedex, France, Fax: (internat.) + 33-1/69154328Search for more papers by this author First published: 30 August 2002 https://doi.org/10.1002/1099-0682(200210)2002:10<2587::AID-EJIC2587>3.0.CO;2-DCitations: 24Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Isomerically pure samples of α1-P2W17O61M were prepared, in which M represents CaII and mainly the first-row transition metal cations: MnII, FeIII, CoII, NiII, CuII, ZnII. The formula is α1-P2W17O62M for VV and MoVI. The compounds were characterised by elemental analysis, IR, UV/Vis and 31P NMR spectroscopy. The stability of these complexes was monitored by cyclic voltammetry and/or UV/Vis spectroscopy. All the compounds proved to be stable for at least 24 h in a pH = 3 medium, even in the presence of 0.2 M Na+, except for the precursor lacunary species itself and the CaII-substituted derivative. In this medium, the transformation of the lacunary heteropolyanion yielded a mixture of α-[P2W18O62]6− and [H2P2W12]12−. The same species were obtained, but at a much slower rate, through the decomposition of α1-P2W17O61Ca. This difference in stability between the lacunary and the CaII-substituted derivatives might be ascribed to size and charge effects, along with the rigidity of the vacant site. At pH = 5, the final product of the transformation of α1-[P2W17O61]10− is α2-[P2W17O61]10−. The presence of Li+ appears to be more favourable than Na+ for the stability of these complexes. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002) References 1 1a B. Keita, L. Nadjo, R. Contant, M. Fournier, G. Hervé, French Patent (CNRS) 89/1,728, February 10, 1989. Google Scholar 1b B. Keita, L. Nadjo, R. Contant, M. Fournier, G. Hervé, Eur. Patent (CNRS), Appl. EP 382,644; Chem. Abstr. 1991, 114, 191882u. Google Scholar 1c B. Keita , A. Belhouari , L. Nadjo , R. Contant , J. Electroanal. Chem. 1995 , 181 , 243 . 10.1016/0022-0728(94)03710-K Web of Science®Google Scholar 1d J. E. Toth , F. C. Anson , J. Am. Chem. Soc. 1989 , 111 , 2444 . 10.1021/ja00189a012 CASWeb of Science®Google Scholar 1e J. E. Toth , F. C. 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