Entropy‐Driven Mechanochemical Synthesis of Polymetallic Zeolitic Imidazolate Frameworks for CO2 Fixation.

High‐entropy materials refer to a kind of materials in which five or more metal species were incorporated deliberately into a single lattice with random occupancy. Up to now, such a concept has been only restricted to hard materials, such as high‐entropy alloys and ceramics. Herein we report the synthesis of hybrid high‐entropy materials, polymetallic zeolitic imidazolate framework (also named as high‐entropy zeolitic imidazolate framework, HE‐ZIF), via entropy‐driven room‐temperature mechanochemistry. HE‐ZIF contains five metals including ZnII, CoII, CdII, NiII, and CuII which are dispersed in the ZIF structure randomly. Moreover, HE‐ZIF shows enhanced catalytic conversion of CO2 into carbonate compared with ZIF‐8 presumably a result of the synergistic effect of the five metal ions as Lewis acid in epoxide activation. Give me five: The synthesis of a hybrid high‐entropy material, a polymetallic zeolitic imidazolate framework (also named a high‐entropy zeolitic imidazolate framework, HE‐ZIF), is made possible by entropy‐driven room‐temperature mechanochemistry. HE‐ZIF contains five metals which are dispersed in the ZIF structure randomly and can be used for conversion of CO2 into carbonate. [ABSTRACT FROM AUTHOR]