A 3D K–Cu heterometal–organic coordination polymer with luminescent properties constructed from two kinds of Cu-cyanide complex units and binuclear K oxo-cluster

• In 1, K+ ions were linked through H3pimdc to form a binuclear chain unit.
• The chains are connected by {Cu3(CN)2(Hpimdc)2} linker to form unique 2D layers.
• The layers are linked by {Cu2(CN)(H3pimdc)2} unit to form 3D net with 1D channel.
• H3pimdc ligand exhibits μ2- and μ4-two kinds of coordination fashions.
• Fluorescent and photocatalytic properties of 1 have been studied.

A novel 3D heterometal–organic coordination polymer [{K2(H2O)6} {Cu3(Hpimdc)2(CN)2}{Cu2(H3pimdc)2(CN)}]·2H2O (1) (H3pimdc = 2-propyl-1H-imidazole-4,5-dicarboxylic acid) has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, PXRD, UV–vis, and single-crystal X-ray diffraction. In complex 1, adjacent K+ ions are linked through H3pimdc to form binuclear chain units {K2(H2O)6}n, which connect with unique Cu-cyanide complex linker {Cu3(CN)2(Hpimdc)2} to form 2D layers. The 2D layers are further connected via another linkage unit {Cu2(CN)(H3pimdc)2} to form 3D frameworks with (41162)2(334251101123164) topology. The H3pimdc ligand in 1 exhibits μ2- and μ4-two kinds of coordination fashions. In addition, the N2 adsorption, fluorescence, and photocatalytic properties of polymer 1 are evaluated detailed.

A novel 3D heterometal–organic coordination polymer is synthesized. In the polymer, adjacent K+ ions are linked through H3pimdc to form a binuclear chain unit, which connects with the unique building block {Cu3(CN)2(Hpimdc)2} to form a 2D layer. The layers are further linked via {Cu2(CN)(H3pimdc)2} to form a 3D network with 1D channel. Polymer 1 exhibits fluorescent properties and good degradation ability for MB under UV light.Figure optionsDownload as PowerPoint slide