A photoactive copper iodide phosphine-based coordination polymer

Abstract

A coordination polymer based on the polymetallic [Cu₄I₄] center was synthesized by coordination with a phenyl-based-diphosphine ligand. The structure of this solid formulated as [Cu₄I₄(Ph₂P(C₆H₄)₂PPh₂)₂]_n, although crystalline, could not be completely resolved using powder X Ray diffraction analysis. Nevertheless, combining different characterization techniques, in particular ⁶³Cu and ³¹P solid-state NMR analyses, provided insights into the polymeric structure. This coordination polymer appears to be of high dimensionality with possible interpenetrated networks, resulting in low porosity. Photoluminescence characterization revealed that the original luminescence thermochromic properties could be ascribed to the photoactive cluster unit.