Syntheses, Crystal Structures and Luminescence Properties of Two Cu4I4 Coordination Polymers Based on 3,5-Dialkyl-1,2,4-triazole

Two Cu4I4 coordination polymers, {[Cu-2(aadmtrz)I-2] center dot CH3CN}(n) (1) and [Cu-2(dptrz)I](n) (2) (aadmtrz=4-((1-aminoethylidene)-amino)-3,5-dimethyl-1,2,4-triazole, dptrz=3,5-dipropy1-1,2,4-triazole), have been synthesized by the solvothermal reactions of CuI and 3,5-dialkyl-4-amino-1,2,4-triazole ligands in mixed H2O/MeCN solution and characterized using elemental analysis, IR, PXRD and single-crystal X-ray diffraction. The structures of the Cu4I4 units in the polymers are different. The Cu4I4 cluster in complex 1 is an inorganic 8-membered ring with a chair chair conformation, while the one in complex 2 is a distorted cube. Complex 1 exhibits 2D 4,4-connected rhombic-grid. Complex 2 is a (3,4)-connected framework with 19.5% porosity. In addition, the luminescent properties of the complexes in the solid state were also investigated. CCDC: 1437794, 1; 1437795, 2.