Syntheses and structures of new copper(I)–indium(III)–selenide clusters

Abstract

The reaction of Se(SiMe₃)₂ with mixtures of copper(I) chloride and indium(III) chloride in the presence of phosphine ligands PR₃ (R = organic group) yielded the new clusters [Cu₆In₈Se₁₃Cl₄(PPh₃)₆(C₄H₈O)] 1, [Cu₆In₈Se₁₃Cl₄(PⁿPr₂Ph)₁₂] 2 and [Cu₁₁In₁₅Se₁₆(SePh)₂₄(PPh₃)₄] 3. The molecular structures of 1, 2 and 3 have been characterised by X-ray crystallography and compared with the chalcopyrite structure of bulk CuInSe₂. UV-VIS Solid state absorption spectra have been measured for 1 and 3.