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A mesoporous cobalt-based metal-organic framework (LCU-606) was synthesized based on a hexagonal bipyramid Co(μ-O) cluster and an ,,','-tetrakis-(4-benzoic acid)-1,4-phenylenediamine ligand (HTBAP). LCU-606 featuring large pore diameters of 21.7 Å and exposed Lewis-acid metal sites could serve as an excellent heterogeneous catalyst for CO cycloaddition reaction with various epoxide substrates under mild conditions (1 atm CO, 60 °C, and solvent free). In particular, when extending the substrates to bulkier ones, LCU-606 still shows high catalytic efficiency on account of the large pore aperture. Also, LCU-606 demonstrates high recyclability and stability in consecutive catalytic runs. Therefore, the high efficiency, recyclability, and generality on CO catalytic cycloaddition make LCU-606 a very promising heterogeneous catalyst for CO chemical fixation.
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