Cubic Cu5FeS4, obtained from a simple refluxing reaction of CuCl, FeCl3 and thiourea in ethylene glycol, showed an optical band gap of 1.25 eV. It can be used as a UV-visible radiation absorber in photovoltaic cells.
We have demonstrated the first ligand free CuI-nanoparticle catalyzed N-arylation of amides/cyclic amides in an ethylene glycol/2-propanol solvent system under mild conditions. This is further extended for one pot synthesis of benzimidazole, and quinazolinone via intermolecular amidation followed by cyclization.