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(H 2 O) 2 (1,3-BIP) 2 ] ⋅ TFBDC} n ( I ), {[Cu 3 (H 2 O) 4 (1,3-BIP) 6 ] ⋅ (BTC) 2 ⋅ (H 2 O) 15 } n ( II ), (1,3-BIP is 1,3-bis(imidazole)propane, H 2 TFBDC is 2,3,5,6-tetrafluoroterephthalic acid and H 3 BTC 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 1 D loop-like chain structure, which are further linked by intermolecular hydrogen bonding to form a 3 D supermolecular architecture. Meanwhile, MCP II exhibits a 2 D layer with (4,4) topology. Furthermore, the stability properties of MCPs I and II were also investigated.