A Novel Supramolecular Tetrahedron Assembled from Tetranuclear Copper(I) Cluster Molecules via Aryl Embrace Interactions

An intriguing supramolecular tetrahedral aggregate [Cu4I(ptt)3(Hptt)3]4 (1; Hptt = 1-phenyl-1H-tetrazole-5-thiol) based on novel copper(I) iodide thiolate clusters in the solid state has been synthesized and characterized. Four tetra-copper(I) cluster molecules join together with the cooperation of multiple offset face-to-face π−π stacking (OFF) and edge-to-face C−H···π (EF) interactions in the form of aryl embrace of a (EF)3(OFF)3 motif, which leads to the formation of this tetrahedral aggregate. Furthermore, this complex exhibits a temperature-dependent green photoluminescence.