A pyridyl-decorated MOF-505 analogue exhibiting hierarchical porosity, selective CO2 capture and catalytic capacity.

An expanded pyridyl-decorated MOF-505 analogue[Cu₂(L)(H₂O)₂]·G_x (H₄L = 5,5′-(pyridine-2,5-diyl)diisophthalic acid, G = solvent molecule) has been solvothermally synthesized and reported. It exhibited rare hierarchical meso- and microporosity. With exposed unsaturated Cu^II sites and Lewis basic pyridyl sites, the material shows both large CO₂-uptake capacity (123.4 cm³ g⁻¹ at 273 K, 1 bar) and high selectivity for CO₂ over N₂ (55.7) at 273 K. Furthermore, for the first time the compound has been exploited for its heterogeneous catalytic performance toward the cyanosilylation reaction under solvent-free conditions. The compound can be recycled up to five times with only a minor loss of activity. [ABSTRACT FROM AUTHOR]