Synthesis, structure and properties of microporous metal–organic frameworks constructed from Ni(II)/Cd(II), Tpt and H4bpta

Two new three-dimensional (3D) porous metal-organic frameworks, [Ni(tpt)2/3(bpta)1/4(H2O)2(OH)]⋅solve (1) and [Cd(tpt)(H2bpta)]⋅solve (2) (tpt = 2,4,6-tris(4-pyridyl)-1,3,5-triazine, H4bpta = (1,1ʹ-biphenyl)-2,2ʹ,6,6ʹ-tetracarboxylic acid) have been prepared, and characterized by single-crystal X-ray diffraction, IR spectra, PXRD, and TG analysis. The results show that complex 1 has a 3D bor network structure with 56.9% solvent-accessible volume, and 2 reveals a novol 3,5-coordinated chiral topology with vertex symbol (4.72)(43.62.74.8) and 52.5% accessible void in the structure. Moreover, gas adsorption properties of desolvated 1 and 2 were investigated.