Pressure Control of Cuprophilic Interactions in a Luminescent Mechanochromic Copper Cluster
Résumé
For the development of applications based on mechanochromic luminescent materials, a
comprehensive study of the mechanism responsible for the emission changes is required. We report the
study of a mechanochromic copper iodide cluster under hydrostatic pressure, which allows control of
crystal packing via modification of the intermolecular interactions. In situ single-crystal powder X-ray
diffraction analysis and emission measurements under pressure permit one to establish a direct
correlation between the molecular structure and luminescence properties and, in particular, to
demonstrate that cuprophilic interactions are responsible for the stimuli-responsive luminescence
properties of such multinuclear coordination compounds.