A Porous Metal–Organic Framework Assembled by [Cu30] Nanocages: Serving as Recyclable Catalysts for CO2 Fixation with Aziridines

Based on a novel ligand 5‐(2,6‐bis(4‐carboxyphenyl)pyridin‐4‐yl)isophthalic acid (H 4 BCP) with large skeletons, a unique porous framework {[Cu 2 (BCP)(H 2 O) 2 ]·3DMF} n ( 1 ) assembled by nano‐sized and censer‐like [Cu 30 ] cages is successfully obtained and structurally characterized. In 1 , the large 1D channel in frameworks and window size in the nanocages can enrich methylene blue and capture CO 2 , exhibiting the promising applications in environmental protection. More importantly, the explorations on the cycloaddition reaction of CO 2 and aziridines with various substituents suggest that 1 can serve as an efficient heterogeneous catalyst for CO 2 conversion with aziridines in a solvent‐free system, which can be reused at least ten times without any obvious loss in catalytic activity. This is the first example of metal–organic framework (MOF)‐based catalysts in converting CO 2 into high‐value oxazolidinones through activating aziridines and CO 2 , further extending the applications of MOFs materials in catalysis.