Synthesis and Structure of Zn(Ⅱ)and Ba(Ⅱ)Coordination Polymers Based on 1,3,5-Tripyrazolylphenyl-4,4',4"-tribenzoic Acid
Two coordination polymers,[Zn2(HL)2(H2O)4·2DMF]n(complex 1)and[Ba(HL)(H2O)2(DMF)]n(complex 2)(H3L=1,3,5-Tripyrazolylphenyl-4,4',4"-tribenzoic acid)have been synthesized under solvothermal conditions with Zn(NO3)2·6H2O and Ba(NO3)2,respec-tively.Complex 1 and 2 were characterized by X-ray single crystal diffraction,elemental analysis and thermogravimetric analysis.X-ray single crystal diffraction analysis shows that complex 1 belongs to the monoclinic system,space group Pc with a=3.844 0(4)nm,b=0.943 1(11)nm,c=1.026 7(12)nm,β=95.426°,Z=2.Complex 2 belongs to the monoclinic crystal system,space group C2/c with a=4.780 1(5)nm,b=0.610 6(6)nm,c=2.549 4(2)nm,β=98.182°,Z=8.For 1,the HL2-ligand and the binuclear Zn(Ⅱ)ion were bridged through the(κ1-κ0-μ1)-(κ1-κ1-μ2)-μ3 coordination mode to form a three-dimensional structure.For 2,the HL2-ligand and the adjacent Ba(Ⅱ)ions were bridged through the(κ1-κ0-μ1)-(κ1-κ1-μ2)-μ3 coordination mode to form a 2D grid structure.In addition,the thermal stability of compounds 1 and 2 has been studied,and the analysis structure shows that compounds 1 and 2 have good thermal stability.
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