Syntheses, structures and luminescent properties of four d10-metal coordination polymers based on the 2,4,5-tri(4-pyridyl)-imidazole ligand

Four d10-metal coordination polymers based on the 2,4,5-tri(4-pyridyl)-imidazole ligand (Htpim), {[Zn2(Htpim)4Cl4] · 8H2O}n (1), {[Cd(tpim)2(H2O)2] · 4CH3OH}n (2), {[Cu2(Htpim)(PPh3)2I2] · CH3CN}n (3) and {[Ag(Htpim)](NO3) · CH2Cl2}n (4), have been synthesized and characterized by elemental analyses, IR, thermogravimetric and X-ray structural analyses. Both complexes 1 and 2 show one dimensional ribbon-like structures. Via intermolecular hydrogen bonds, a 2D supramolecular network and 3D framework are formed for 1 and 2, respectively. Complex 3 shows a 1D zigzag chain with a CuI2Cu rhomboid dimer. Complex 4 shows a 1D ladder-like polymer with two different metallacycles. The luminescent properties of all the complexes have been studied in the solid state.

Graphical abstractFour new d10-metal coordination polymers based on 2,4,5-tri(4-pyridyl)-imidazole have been successfully synthesized and structurally characterized. All the complexes, together with the free ligand, display photoluminescence at room temperature.Figure optionsDownload full-size imageDownload as PowerPoint slide