New Three-Dimensional Porous Metal Organic Framework with Tetrazole Functionalized Aromatic Carboxylic Acid: Synthesis, Structure, and Gas Adsorption Properties

5-(1H-Tetrazol-1-yl)isophthalic acid (H2L) reacts with Cu(II) ion forming a new metal−organic framework {[CuL]·DMF·H2O}∞ (1) (DMF = N,N-dimethylformamide), with a rutile-related type net topology. Compound 1 possesses a 3D structure with 1D channels that can be desolvated to yield a microporous material. Adsorption properties (N2, H2, O2, CO2, and CH4) of the desolvated solid [CuL] (1a) have been studied, and the results exhibit that 1a possesses fairly good capability of gas sorption for N2, H2, O2, and CO2 gases, with high selectivity ratios for O2 over H2 at 77 K and CO2 over CH4 at 195, 273, and 298 K. Furthermore, 1a has excellent O2 uptake at 77 K and a remarkably high quantity of adsorption for CO2 at room temperature (298 K) and atmospheric pressure, suggesting its potential applications in gas separation or purification.