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

Abstract

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 (Q_st) 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.