Synthesis and photoluminescent properties of two 2D and 3D iodocuprates modified by a protonated ligand

Abstract

Two new cuprous iodides [Cu₄I₅(DABCOH⁺)CH₃CN] (1) and [Cu₇I₈(DABCOH⁺)DABCO] (2) (DABCO = 1,4-diazabicyclo-[2.2.2]octane) have been prepared solvothermally and characterized by IR, TGA, elemental analysis, powder/single-crystal X-ray diffraction and photoluminescent properties. Compound 1 contains a 2D cuprous iodide layer Cu₄I₅⁻, while compound 2 exhibits a novel 3D open framework constructed from [Cu₁₄I₁₆]²⁻clusters with six-connected (4¹²·6³) net, and both of them are modified by monoprotonated DABCO ligand, which may be related with the high-dimensional iodocuprates. 1 and 2 display intense orange emission with maximum at 547 nm and 561 nm, respectively, which are rarely found in the most reported iodocuprates.