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Sub-micrometric β-CoMoO4 rods: optical and piezochromic properties.

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBLANCO-GUTIERREZ, Veronica
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
dc.date.issued2013
dc.identifier.issn1477-9226
dc.description.abstractEnSub-micrometric β-CoMoO4 rods have been obtained after thermal treatment of CoMoO4*H2O previously prepared by the precipitation method. The color of the sub-micrometric particles has been investigated through diffuse reflectance in the VIS-IR range and the spectra have been compared with those corresponding to samples with larger isotropic particles. The O(2-)→Mo(6+) charge transfer band shifts to the UV region with decreasing the particle size, revealing a more covalent bond. This can be justified under the consideration of a higher proportion of surface-atoms in sub-micrometric particles that present lower coordination number. The piezochromic behavior of the sub-micrometric β-CoMoO4 rods has been investigated. As the sub-micrometric size of the particles stabilizes the low-coordination phase (β-phase), the transition pressure to the α-phase is higher in comparison with that corresponding to larger particles. In addition, it was not possible to obtain a 100% transformation of the β-phase in the sample with sub-micrometric particles. A similar temperature influence on the transition pressure regardless of particle size has also been observed.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.subject.enSpectrometry
dc.subject.enSub-micrometric particles
dc.subject.enColor
dc.subject.enCobalt molybdate
dc.title.enSub-micrometric β-CoMoO4 rods: optical and piezochromic properties.
dc.typeArticle de revue
dc.identifier.doi10.1039/c3dt51656c
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie inorganique
bordeaux.journalDalton Transactions
bordeaux.page13622-13627
bordeaux.volume42
bordeaux.issue37
bordeaux.peerReviewedoui
hal.identifierhal-00861792
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00861792v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Dalton%20Transactions&rft.date=2013&rft.volume=42&rft.issue=37&rft.spage=13622-13627&rft.epage=13622-13627&rft.eissn=1477-9226&rft.issn=1477-9226&rft.au=BLANCO-GUTIERREZ,%20Veronica&DEMOURGUES,%20Alain&GAUDON,%20Manuel&rft.genre=article


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