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Polymorphic copper iodide clusters: insights into the mechanochromic luminescence properties.

hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorBENITO, Quentin
hal.structure.identifierLaboratoire Hétéroéléments et Coordination [DCPH]
dc.contributor.authorLE GOFF, X.
hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorMARON, Sébastien
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFARGUES, Alexandre
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.authorMARTINEAU, Charlotte
hal.structure.identifierInstitut Lavoisier de Versailles [ILV]
dc.contributor.authorTAULELLE, Francis
hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
dc.contributor.authorKAHLAL, Samia
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
hal.structure.identifierLaboratoire de physique de la matière condensée [LPMC]
dc.contributor.authorPERRUCHAS, Sandrine
dc.date.issued2014
dc.identifier.issn0002-7863
dc.description.abstractEnAn in-depth study of mechanochromic and thermochromic luminescent copper iodide clusters exhibiting structural polymorphism is reported and gives new insights into the origin of the mechanochromic luminescence properties. The two different crystalline polymorphs exhibit distinct luminescence properties with one being green emissive and the other one being yellow emissive. Upon mechanical grinding, only one of the polymorphs exhibits great modification of its emission from green to yellow. Interestingly, the photophysical properties of the resulting partially amorphous crushed compound are closed to those of the other yellow polymorph. Comparative structural and optical analyses of the different phases including a solution of clusters permit us to establish a correlation between the Cu-Cu bond distances and the luminescence properties. In addition, the local structure of the [Cu4I4P4] cluster cores has been probed by (31)P and (65)Cu solid-state NMR analysis, which readily indicates that the grinding process modifies the phosphorus and copper atoms environments. The mechanochromic phenomenon is thus explained by the disruption of the crystal packing within intermolecular interactions inducing shortening of the Cu-Cu bond distances in the [Cu4I4] cluster core and eventually modification of the emissive state. These results definitely establish the role of cuprophilic interactions in the mechanochromism of copper iodide clusters. More generally, this study constitutes a step further into the understanding of the mechanism involved in the mechanochromic luminescent properties of metal-based compounds.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enPolymorphic copper iodide clusters: insights into the mechanochromic luminescence properties.
dc.typeArticle de revue
dc.identifier.doi10.1021/ja500247b
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of the American Chemical Society
bordeaux.page11311-11320
bordeaux.volume136
bordeaux.issue32
bordeaux.peerReviewedoui
hal.identifierhal-01060896
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01060896v1
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