A novel 3-fold interpenetration metal–organic framework with tunable luminescence and selective adsorption of CO2 properties

A novel acylamide MOF, Zn2(L)(oba)2·2DMF·2H2O [1, H2oba = 4,4′-oxybis(benzoic acid), L = N1,N4-di(pyridin-4-yl)terephthalamide], has been synthesized by a solvothermal method. The adsorption study indicates that 1 shows higher selective adsorption behaviors of CO2 rather than CH4, CO, N2 and significant isosteric heat (Qst) of CO2 (39.3 kJ mol−1), which are attributed to the nature of the acylamide groups holding unique affinity towards CO2. Vapor adsorption studies indicate that 1 has higher selective adsorption of water vapor over ethanol and methanol vapor. In addition, tunable luminescence properties dependent on the excitation wavelengths were observed.