Enhancing CO2adsorption enthalpy and selectivity viaamino functionalization of a tetrahedral framework material

The cooperative assembly of mixed 2-aminoisonicotinate and adeninate ligands with Zn2+ centers generates a porous tetrahedral framework material with rich amino groups in the pores, which shows high CO2 uptake at 0.1 bar, high enthalpy of CO2 adsorption (40 kJ mol−1) and excellent adsorption selectivity of CO2 over N2 under ambient conditions.