Crystal structure and characterization of two cadmium(II) coordination polymers with a multidentate N-donor tecton 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-1H-1,2,4-triazole

摘要

Two new cadmium(II) complexes [Cd_(1.5)(L)Cl_2(H_2O)]_(2n) (1) and [CdL_2]_n (2) with a multidentate N-donor building block 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-lH-l,2,4-triazole (HL) have been prepared and characterized by elemental analysis, infra-red spectra, powder X-ray diffraction (XRD), and single-crystal XRD. 1 is a 2-D layered coordination polymer constructed from linkage of [Cd_3(μ-Cl)_4] trinuclear units with HL spacers, while 2 shows a 2-D layer structure. 3-D supramo-lecular architectures are further assembled in 1 and 2 via hydrogen-bonding contacts. Both 1 and 2 are thermally stable to 450 °C, and 2 showed strong fluorescent emission bands.