Anchoring Ag(I) into MOF-253 for Effectively Catalyzing Cycloaddition of CO₂ with Alkynyl Alcohols/Amine under Ambient Conditions

In the era of global warming, the conversion of carbon dioxide into high-value products has become a widely scrutinized emerging mitigation strategy. Metalation of bpy-containing MOF-253 led to the synthesis of MOF-253-0.5Ag, which acts as an efficient catalyst for the carbonylative cyclization of CO₂ with alkyne molecules (such as propynyl alcohols and propynyl amines) at room temperature and ambient CO₂ pressure, yielding the corresponding α-alkyl cyclic carbonates and oxazolidinones, thus endowing the catalytic system with bifunctional characteristics. Additionally, the MOF-253-0.5Ag catalyst demonstrated stability, high activity, and recyclability. The mechanisms were further elucidated through experimental results and NMR analysis, demonstrating that Ag(I) can effectively activate the C≡C bonds and hydroxy/amino groups of the substrates.