A new Co-nitroimidazolate–dicarboxylate pillared-layer network with various types of channels and ultra-large cages for gas uptake

A 3-D pillared-layer metal–organic framework constructed from unprecedented Co₃-Co₂-bdc-based layers and 2-nitroimidazole as pillars exhibits various types of pores and a nanometer-sized cavity along with a high CO₂ uptake capacity (73.3 cm³ g⁻¹ at 273 K and 1 atm).