High and Selective CO2 Uptake in a Cobalt Adeninate Metal−Organic Framework Exhibiting Pyrimidine- and Amino-Decorated Pores

The synthesis and structure of Co2(ad)2(CO2CH3)2·2DMF·0.5H2O (bio-MOF-11) is described. Pyrimidine and amino groups of adeninate (ad) decorate the pores of the framework. The porosity of this material was studied, and its CO2 and H2 adsorption properties were evaluated. bio-MOF-11 exhibits a high heat of adsorption for CO2 (∼45 kJ/mol), a high CO2 capacity (∼6 mmol/g, 273 K), and exceptional selectivity for CO2 over N2 at 273 K (81:1) and 298 K (75:1).