title: A solid state highly emissive Cu(i) metallacycle: promotion of cuprophilic interactions at the excited states.
abstract: The straightforward synthesis of a new Cu(i) metal-rich small metallacycle is presented. This compound is luminescent in the solid state with an emission quantum yield of 72% at room temperature and displays a pronounced reversible red-shift of its emission spectra upon cooling. Quantum chemical calculations reveal that these properties are governed by important geometrical relaxations that imply the formation of cuprophilic interactions at the excited states.
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: M
authors.initials: M
authors.lastname: El Sayed Moussa
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: S
authors.initials: S
authors.lastname: Evariste
authors.affiliation: Institute of Molecular Functional Materials [Areas of Excellencce Scheme, University Grants Committee (Hong Kong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China. wwyam@hku.hk.
authors.forename: H-L
authors.initials: HL
authors.lastname: Wong
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: L
authors.initials: L
authors.lastname: Le Bras
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-ENSCR, 11 Allée de Beaulieu, 35708 Rennes, France.
authors.forename: C
authors.initials: C
authors.lastname: Roiland
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-ENSCR, 11 Allée de Beaulieu, 35708 Rennes, France.
authors.forename: L
authors.initials: L
authors.lastname: Le Polles
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: B
authors.initials: B
authors.lastname: Le Guennic
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: K
authors.initials: K
authors.lastname: Costuas
authors.affiliation: Institute of Molecular Functional Materials [Areas of Excellencce Scheme, University Grants Committee (Hong Kong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China. wwyam@hku.hk.
authors.forename: V W-W
authors.initials: VW
authors.lastname: Yam
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. karine.costuas@univ-rennes1.fr christophe.lescop@univ-rennes1.fr.
authors.forename: C
authors.initials: C
authors.lastname: Lescop