Solvothermal Synthesis and Structural Characterization of New Zn−Triazole−Sulfoisophthalate Frameworks.

Two new Zn-based coordination polymers based polymers, namely, Zn7(TRZ)8(SIP)2·7H2O (1) and Zn5Na2(DMA)4(TRZ)4(SIP)4·5H2O (2) (TRZ 1,2,4-triazole, SIP sulfoisophthalate, and DMA dimethylamine), were synthesized under mild solvothermal conditions. Their crystal structures were characterized by single-crystal X-ray diffraction, and their thermal properties were examined by thermogravimetric analysis. Structure 1crystallizes in monoclinic P21/nspace group (a14.050(3) Å, b12.517(3) Å, c15.377(3) Å, 97.95(3)°, V2678.3(9) Å3, Z2), while structure 2is described as triclinic P(a9.701(2) Å, b12.442(3) Å, c17.218(3) Å, 89.83(3)°, 75.01(3)°, 73.33(3)°, V1917.5(7) Å3, Z1). Structure 1contains 8- and 16-membered channels made of Zn polyhedra linked by TRZ, which are occupied by water molecules and SIP ligands. Structure 2consists of one-dimensional chains of Zn−TRZ moieties that are linked to each other via SIP. It is a negatively charged open framework in which Naions and protonated dimethylamine in the cavities serve as counterions. [ABSTRACT FROM AUTHOR]