Multistimuli-Responsive Luminescent Material Reversible Switching Colors via Temperature and Mechanical Force

A new multistimuli-responsive luminescent material, [Cu 8 I 8 (4-dpda) 6 ] n ( 1 ) (4-dpda=4-(diphenylphosphino)- N,N -dimethylaniline), has been obtained by combining inorganic Cu 8 I 8 clusters and organic ligands 4-dpda, providing a novel in-/organic hybrid approach as an interesting alternative to all-organic approaches. Compound 1 responds well to thermo and mechanical force independently with color change due to the fact that the stimuli affect frontier molecular orbital and molecular packing modes, respectively.