1. Melt-quenched glass formation of a family of metal-carboxylate frameworks.
- Author
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Xue WL, Li GQ, Chen H, Han YC, Feng L, Wang L, Gu XL, Hu SY, Deng YH, Tan L, Dove MT, Li W, Zhang J, Dong H, Chen Z, Deng WH, Xu G, Wang G, and Wan CQ
- Abstract
Metal-organic framework (MOF) glasses are an emerging class of glasses which complement traditional inorganic, organic and metallic counterparts due to their hybrid nature. Although a few zeolitic imidazolate frameworks have been made into glasses, how to melt and quench the largest subclass of MOFs, metal carboxylate frameworks, into glasses remains challenging. Here, we develop a strategy by grafting the zwitterions on the carboxylate ligands and incorporating organic acids in the framework channels to enable the glass formation. The charge delocalization of zwitterion-acid subsystem and the densely filled channels facilitate the coordination bonding mismatch and thus reduce the melting temperature. Following melt-quenching realizes the glass formation of a family of carboxylate MOFs (UiO-67, UiO-68 and DUT-5), which are usually believed to be un-meltable. Our work opens up an avenue for melt-quenching porous molecular solids into glasses., (© 2024. The Author(s).)
- Published
- 2024
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