Manometric real-time studies of the mechanochemical synthesis of zeolitic imidazolate frameworks.
Manometric real-time studies of the mechanochemical synthesis of zeolitic imidazolate frameworks.
复制标题
沸石咪唑酸盐框架的机械化学合成的测压实时研究。
DOI:
10.1039/c9sc05514b
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发表时间:
2020-01-02
期刊:
影响因子:
8.4
通讯作者:
Friščić T
中科院分区:
文献类型:
--
作者:
Brekalo I;Yuan W;Mottillo C;Lu Y;Zhang Y;Casaban J;Holman KT;James SL;Duarte F;Williams PA;Harris KDM;Friščić T
We demonstrate a simple method for real-time monitoring of mechanochemical synthesis of metal–organic frameworks, by measuring changes in pressure of gas produced in the reaction. Using this manometric method to monitor the mechanosynthesis of the zeolitic imidazolate framework ZIF-8 from basic zinc carbonate reveals an intriguing feedback mechanism in which the initially formed ZIF-8 reacts with the CO2 byproduct to produce a complex metal carbonate phase, the structure of which is determined directly from powder X-ray diffraction data. We also show that the formation of the carbonate phase may be prevented by addition of excess ligand. The excess ligand can subsequently be removed by sublimation, and reused. This enables not only the synthesis but also the purification, as well as the activation of the MOF to be performed entirely without solvent. We demonstrate a simple method for real-time monitoring of mechanochemical synthesis of metal–organic frameworks, by measuring changes in pressure of gas produced in the reaction.
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