AI Article Synopsis
- A new 3D zinc-based metal-organic framework (MOF) was created using a unique organosilicon-based linker, which provides multiple -COO sites for zinc immobilization and features irregular channels and a large surface area for potential catalytic use.
- The framework was further modified by adding magnesium to form a bimetallic MOF (ZnMg-), which showed improved catalytic performance over the original zinc framework in specific reactions.
- Experiments and theoretical analyses suggested that the presence of bimetallic active sites in ZnMg- enhances the chemical fixation of epoxides and CO, leading to effective production of cyclic carbonates.
Article Abstract
A new 3D zinc-based metal-organic framework {[ZnL(DMF)(HO)(OH)]·5DMF} () (HL = 5,5',5″-(methylsilanetriyl) triisophthalic acid) was constructed with an organosilicon-based linker, where HL is a tetrahedral structure furnished with rich -COO chelating sites for Zn(II) immobilization. Compound exhibited two types of irregular one-dimensional channels and a three-dimensional skeleton with large specific surface area, making it a promising catalytic platform. Moreover, by incorporation of the second metal ion into the inorganic node of framework , isomorphic bimetallic MOF ZnMg- was successfully synthesized. ZnMg- demonstrated enhanced catalytic activity compared to under identical conditions. Contrast experiments and theoretical calculations indicate that bimetallic active sites play a facilitating role in the chemical fixation of epoxides and CO. It indicated that efficient chemical fixation of CO to cyclic carbonates was obtained over isomorphic MOF catalysts and ZnMg-.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c03744 | DOI Listing |
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