Keggin (K5, H3O)[SiV3W9O40H]·xH2O: ...
Document type :
Article dans une revue scientifique
Permalink :
Title :
Keggin (K5, H3O)[SiV3W9O40H]·xH2O: Characterization and crystal structure
Author(s) :
Bonfim, Rodrigo de Paiva Floro [Auteur]
Instituto de Química [Brasilia] [IQ]
de Moura, Luiza Cristina [Auteur]
Instituto de Química [Brasilia] [IQ]
Eon, Jean-Guillaume [Auteur]
Instituto de Química [Brasilia] [IQ]
Mentre, Olivier [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Caldarelli, Stefano [Auteur]
Aix Marseille Université [AMU]
Instituto de Química [Brasilia] [IQ]
de Moura, Luiza Cristina [Auteur]
Instituto de Química [Brasilia] [IQ]
Eon, Jean-Guillaume [Auteur]
Instituto de Química [Brasilia] [IQ]
Mentre, Olivier [Auteur]

Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Caldarelli, Stefano [Auteur]
Aix Marseille Université [AMU]
Journal title :
Journal of Solid State Chemistry
Volume number :
213
Pages :
9-16
Publisher :
Elsevier BV
Publication date :
2014-05
ISSN :
0022-4596
English keyword(s) :
Keggin ion
51V NMR
EPR
Single crystal structure
51V NMR
EPR
Single crystal structure
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
Single crystals of the potassium salt (K5, H3O)[SiV3W9O40H]·xH2O of the vanadium tri-substituted α-Keggin dodecatungstosilicate were prepared and analyzed by vibrational, EPR and 51V NMR spectroscopy. Varying the synthesis ...
Show more >Single crystals of the potassium salt (K5, H3O)[SiV3W9O40H]·xH2O of the vanadium tri-substituted α-Keggin dodecatungstosilicate were prepared and analyzed by vibrational, EPR and 51V NMR spectroscopy. Varying the synthesis conditions allows crystallization of partially reduced anions. The crystal structure was determined for both oxidized (V5+) and partially reduced (V4+/5+) potassium salts. Single crystal X-ray diffraction data and solid state 51V-NMR spectra confirm the occurrence of a single vanadium site in a cubic structure due to rotational disorder of the Keggin ion. Partially reduced compounds crystallize within the same structure as fully oxidized ones. EPR experiments confirm strong interaction of V4+ with two V5+ ions, in accordance with insertion of a V3 subunit into the lacunary Keggin ion as designed in the synthesis method. The 3D-edifice is composed of K+/H2O counter-sublattice with evidence of tunable water occupancy.Show less >
Show more >Single crystals of the potassium salt (K5, H3O)[SiV3W9O40H]·xH2O of the vanadium tri-substituted α-Keggin dodecatungstosilicate were prepared and analyzed by vibrational, EPR and 51V NMR spectroscopy. Varying the synthesis conditions allows crystallization of partially reduced anions. The crystal structure was determined for both oxidized (V5+) and partially reduced (V4+/5+) potassium salts. Single crystal X-ray diffraction data and solid state 51V-NMR spectra confirm the occurrence of a single vanadium site in a cubic structure due to rotational disorder of the Keggin ion. Partially reduced compounds crystallize within the same structure as fully oxidized ones. EPR experiments confirm strong interaction of V4+ with two V5+ ions, in accordance with insertion of a V3 subunit into the lacunary Keggin ion as designed in the synthesis method. The 3D-edifice is composed of K+/H2O counter-sublattice with evidence of tunable water occupancy.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Research team(s) :
Propriétés magnéto structurales des matériaux (PMSM)
Submission date :
2021-06-17T14:02:05Z
2021-09-27T12:00:48Z
2021-09-27T12:00:48Z