A New Metal-organic Framework Constructed from Flexible Polycarboxylate Acid and Rigid Imidazole-bas

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A new complex, [Ni3(L)2(BTA)2]·2H2O (1, L=1,4-di(1H-imidazol-4-yl)benzene, H3BTA=benzene-1,3,5-triacetic acid), has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, TG and PXRD. The complex crystallizes in monoclinic, space group P1 with a=9.0303(12), b=10.0796(13), c=12.7966(17) , α=99.268(2), β=94.490(2), γ=103.722(3)o, V=1108.5(3) 3 , Z=2, C48H38N8O14Ni3 , Mr=1126.99, Dc=1.688 g/cm3 , μ=1.344 mm-1 , S=1.001, F(000)=578, the final R=0.0389 and wR=0.0895 for 3083 observed reflections (I > 2σ(I)). In the title complex, the flexible BTA3- ligands utilize oxygen atoms of carboxylate groups to coordinate with Ni(II) ions to form two-dimensional double-layer networks which are further pillared into a three-dimension framework via the rigid ditopic ligand L. Topological analysis revealed that complex 1 is a typical (3,8)-connected tfz-d 3D network based on the trinuclear [Ni3(CO2)6N4] subunits. A new complex, [Ni3 (L) 2 (BTA) 2] · 2H2O (1, L = 1,4-di (1H- imidazol- 4-yl) benzene, H3BTA = benzene- 1,3,5-triacetic acid The complex crystallizes in monoclinic, space group P1 with a = 9.0303 (12), b = 10.0796 (13) , c = 12.7966 17, α = 99.268 (2), β = 94.490 (2), γ = 103.722 (3) o, V = 1108.5 (3) 3, Z = 2, C48H38N8O14Ni3, Mr = 1126.99, D = 1.688 g / cm 3, μ = 1.344 mm -1, S = 1.001, F (000) = 578, the final R = 0.0389 and wR = 0.0895 for 3083 observed reflections (I> 2σ (I)). complex, the flexible BTA3-ligands utilize oxygen atoms of carboxylate groups to coordinate with Ni (II) ions to form two-dimensional double-layer networks which are further pillared into a three-dimension framework via the rigid ditopic ligand L that complex 1 is a typical (3,8) -connected tfz-d 3D network based on the trinuclear [Ni3 (CO2) 6N4] subunits.
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