Mixed-Ligand Luminescent Cu(I) Complexes Based on 10-(Aryl)Phenoxarsines and Acetonitrile with a Cubane-Type Cu4I4 Core

Copper(I) complexes [L3Cu4I4(CH3CN)] (where L1 is 10-(4-tolyl)phenoxarsine (I), L2 is 10-(4-bromophenyl)phenoxarsine (II)) were obtained by the mechanosynthesis consisting of grinding powders of 10-(aryl)phenoxarsines and copper(I) iodide in an equimolar ratio with the addition of a small amount of acetonitrile. The complexes were characterized by mass spectrometry, elemental analysis, and 1H NMR spectroscopy. The molecular structure of complex I was determined by X-ray diffraction (CCDC no. 2468768 (I)). Cluster has the cubane-type geometry. All of the complexes exhibit orange emission.