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Spectroscopic and Magnetic Properties of the Metastable States in the Coordination Network [{Co(prm)(2)}(2){Co(H(2)O)(2)}{W(CN)(8)}(2)]*4H(2)O (prm = pyrimidine).

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLE BRIS, Rémy
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorTSUNOBUCHI, Yoshihide
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMATHONIÈRE, Corine
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorTOKORO, Hiroko
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorOHKOSHI, Shin-Ichi
dc.contributor.authorOULD-MOUSSA, Nawell
hal.structure.identifierLaboratoire de chimie de coordination [LCC]
dc.contributor.authorMOLNÁR, Gábor
hal.structure.identifierLaboratoire de chimie de coordination [LCC]
dc.contributor.authorBOUSSEKSOU, Azzedine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
dc.date.issued2012
dc.identifier.issn0020-1669
dc.description.abstractEnThe study of the metastable states, obtained by thermal quenching or by light irradiation in the [{Co(prm)(2)}(2){Co(H(2)O)(2)}{W(CN)(8)}(2)]*4H(2)O complex, is reported using powder X-ray diffraction, Raman spectroscopy, optical reflectivity, and magnetic measurements. This compound is characterized by a electron-transfer (ET) phase transition occurring between a high-temperature phase (HT phase) formed by paramagnetic Co(II)-W(V) units and a low-temperature phase (LT phase) formed by diamagnetic Co(III)-W(IV) units. Metastable phases can be induced at low temperature either by thermal quenching rapidly cooling phase named RC or by irradiation photo-induced phase named PI similar to the well-known Light-Induced Excited Spin State Trapping effect. The relaxation dynamics of the metastable phases have been studied and revealed some differences between the RC and PI phases. The sigmoidal shape of the relaxation curves in the RC phase is in agreement with the cooperative nature of the process. Thermodynamic parameters that govern the relaxation have been determined and used to reproduce the experimental Thermal-Induced Excited Spin State Trapping curve.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enMetastable states
dc.subject.enThermal quenching
dc.subject.enLight irradiation
dc.subject.enMolecular materials
dc.subject.enX-ray diffraction
dc.subject.enRaman spectroscopy
dc.subject.enOptical reflectivity
dc.subject.enMagnetic measurements
dc.title.enSpectroscopic and Magnetic Properties of the Metastable States in the Coordination Network [{Co(prm)(2)}(2){Co(H(2)O)(2)}{W(CN)(8)}(2)]*4H(2)O (prm = pyrimidine).
dc.typeArticle de revue
dc.identifier.doi10.1021/ic2019692
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page2852-2859
bordeaux.volume51
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-00684065
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00684065v1
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