Green CS2 Conversion Catalyzed by a Three-Dimensional Porous Cerium-Organic Framework.

Excessive emissions of industrial waste carbon dioxide (CS2) seriously damage the ecological environment. The green and effective conversion into economically valuable chemicals is an emerging approach. Hence, a novel three-dimensional cerium-organic framework (1) was constructed by 4,4',4″-nitrilotribenzoic acid and Ce(NO3)3·6H2O, which exhibited high thermal and solvent stability. A unique square channel, rich Lewis acid sites, and stable framework make 1 an efficient catalyst to promote the cycloaddition of CS2 with aziridine substrates under mild conditions and circulate five times without a significant decrease in activity. Mechanism exploration indicated that the activation, confinement effect, and multicomponent synergistic effect of catalyst 1 promoted the conversion process.