Porous pcu-type Zn(II) framework material with high adsorption selectivity for CO2 over N2

• Solvothermal synthesis of a porous Zn(II) compound.
• It exhibits high CO2 sorption capacity.
• It exhibits high sorption selectivity for CO2 over N2 at 298 K.

Reported here is a new Zn(II) compound, namely [Zn2(tdc)2(MA)]n (H2tdc = 2,5-thiophenedicarboxylic acid, MA = melamine), which has been constructed by the self-assembly reaction of Zn(NO3)2, H2tdc and MA under solvothermal conditions. Single crystal X-ray diffraction analysis reveals that this compound features a 3D porous framework with 6-connected pcu topology. Notably, this compound exhibits high CO2 sorption capacity and high sorption selectivity for CO2 over N2 at 298 K.