Solvothermal synthesis, structure and properties of heterometallic coordination polymer based on metalloligand and alkaline-earth metal calcium

摘要

A new 3D heterometallic coordination polymer (HCP), which formulated as {[Ca(H2O)(2)][L-Co]center dot DMSO center dot 2H(2)O}(n) (1) (DMSO = dimethyl sulfoxide), has been solvothermally synthesized from metalloligand L-Co = [Co(2,4-pydca)(2)](2-) (2,4-pydca = pyridine-2,4-dicarboxylate) and alkaline-earth ion Ca-II. HCP 1 has been well characterized by Fourier-transform infrared spectroscopy, elemental analysis and single-crystal X-ray diffraction analysis. The crystallographic analysis indicates that HCP 1 crystallizes in the monoclinic system with space group of C2 and possesses the 3D framework structure, which is constructed from metalloligands L-co connecting with Ca-II ions via the carboxyl groups. The 3D framework of HCP 1 can be defined as (4,4,4)-connected 3-nodal topology with the point symbol of {4(2).8(4)}{4(2).8(4)} {4(2).8(4)}. Thermogravimetric analysis exhibits that the skeleton of HCP 1 collapses after 375 degrees C. Magnetic susceptibility study reveals the presence of antiferromagnetic interaction between the spin centers. The solid-state luminescence property of HCP 1 has also been investigated. (C) 2019 Elsevier B.V. All rights reserved.