The gas adsorption is an important research field of coordination chemistry and bioinorganic chemistry, in which the selective absorption of CO2 in the presence of N-2 is a challenge in these fields. A coordination polymer Ni-2(tib)(2)(1,4-NDC)(2)center dot 7H(2)O (NTN) was synthetized by the reaction of the mixed ligands: 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) and 1,3,5-tris(1-imidazolyl) benzene (Tib) with Ni2+ under solvothermal conditions. X-ray single-crystal analysis (CIF file CCDC no. 2053530) results indicate that NTN possesses a supramolecular isomers with two-fold interpenetrating 3D frameworks with {4(2)center dot 6(5)center dot 8(3)}{4(2)center dot 6} topology. NTN is further characterized by powder IR spectroscopy, elemental analysis, X-ray diffraction, and thermogravimetric analysis. Notably, NTN possess an excellent selective CO2 sorption property compared with N-2.
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