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Thermochromic luminescence of sol−fel films based on copper Iodide clusters

hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorTARD, Cédric
hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorPERRUCHAS, Sandrine
hal.structure.identifierLaboratoire Hétéroéléments et Coordination [DCPH]
dc.contributor.authorMARON, Sébastien
hal.structure.identifierLaboratoire Hétéroéléments et Coordination [DCPH]
dc.contributor.authorLE GOFF, X.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUILLEN, François
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGARCIA, Alain
hal.structure.identifierInstitut Lavoisier de Versailles [ILV]
dc.contributor.authorVIGNERON, Jacky
hal.structure.identifierInstitut Lavoisier de Versailles [ILV]
dc.contributor.authorETCHEBERRY, Arnaud
hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorGACOIN, Thierry
hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorBOILOT, Jean-Pierre
dc.date.issued2008
dc.identifier.issn0897-4756
dc.description.abstractEnThe incorporation of copper iodide clusters in sol−gel silica has been investigated to prepare materials with original luminescent properties. The synthesis, structural characterizations, and optical properties of sol−gel films containing [Cu4I4L4] clusters, L = phosphine-based ligands, are reported. Clusters studied are [Cu4I4(PPh2(CH2)2Si(OCH2CH3)3)4] (C1), able to copolymerize with the silica matrix, and [Cu4I4(PPh2(CH2)2CH3)4] (C2) used as a reference for the characterizations. The luminescent films exhibit the optical properties of these clusters in accordance with XPS and NMR studies demonstrating their integrity in the gel matrix. The temperature dependence of light emission properties of clusters and films shows, for the first time for phosphine-based [Cu4X4L4] clusters, thermochromic luminescence with bright yellow luminescence at room temperature and purple emission at 77 K. As a result of weak Cu−Cu interactions, the two emissive states appear as highly coupled with a low energy barrier (2 kJ·mol−1), leading to a controlled thermochromism in a large temperature range.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enThermochromism
dc.subject.enLuminescence
dc.subject.enFilms
dc.subject.enSol-gel process
dc.subject.enInorganic compounds
dc.title.enThermochromic luminescence of sol−fel films based on copper Iodide clusters
dc.typeArticle de revue
dc.identifier.doi10.1021/cm801780g
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page7010-7016
bordeaux.volume20
bordeaux.issue22
bordeaux.peerReviewedoui
hal.identifierhal-00351190
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00351190v1
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