title: Mechanochromic luminescence of copper iodide clusters.
abstract: Luminescent mechanochromic materials are particularly appealing for the development of stimuli-responsive materials. Establishing the mechanism responsible for the mechanochromism is always an issue owing to the difficulty in characterizing the ground phase. Herein, the study of real crystalline polymorphs of a mechanochromic and thermochromic luminescent copper iodide cluster permits us to clearly establish the mechanism involved. The local disruption of the crystal packing induces changes in the cluster geometry and in particular the modification of the cuprophilic interactions, which consequently modify the emissive states. This study constitutes a step further toward the understanding of the mechanism involved in the mechanochromic luminescent properties of multimetallic coordination complexes.
authors.affiliation: Laboratoire de Physique de la Matière Condensée, UMR 7643, CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex (France).
authors.forename: Quentin
authors.initials: Q
authors.lastname: Benito
authors.forename: Isabelle
authors.initials: I
authors.lastname: Maurin
authors.forename: Thibaut
authors.initials: T
authors.lastname: Cheisson
authors.forename: Gregory
authors.initials: G
authors.lastname: Nocton
authors.forename: Alexandre
authors.initials: A
authors.lastname: Fargues
authors.forename: Alain
authors.initials: A
authors.lastname: Garcia
authors.forename: Charlotte
authors.initials: C
authors.lastname: Martineau
authors.forename: Thierry
authors.initials: T
authors.lastname: Gacoin
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Boilot
authors.forename: Sandrine
authors.initials: S
authors.lastname: Perruchas
keywords: X-ray diffraction; cluster compounds; copper; luminescence; polymorphism