Two Ni(II)/Cu(II) Coordination Polymer Constructed from Flexible Bisimidazole and Polycarboxyl Co-Ligands: Syntheses, Crystal Structures, and Thermal Stability

Two metal coordination polymers, namely {[Ni(H2O)2(1,3-BIP)2] ⋅ TFBDC}n (I), {[Cu3(H2O)4(1,3-BIP)6] ⋅ (BTC)2 ⋅ (H2O)15}n (II), (1,3-BIP is 1,3-bis(imidazole)propane, H2TFBDC is 2,3,5,6-tetrafluoroterephthalic acid and H3BTC is 1,3,5-benzenetricarboxylic acid) were prepared under solvothermal conditions and characterized by single crystal and powder X-ray diffraction, IR spectra and elemental analyses. The single crystal X-ray diffraction reveals that MCP I exhibits a 1D loop-like chain structure, which are further linked by intermolecular hydrogen bonding to form a 3D supermolecular architecture. Meanwhile, MCP II exhibits a 2D layer with (4,4) topology. Furthermore, the stability properties of MCPs I and II were also investigated.