Design and Synthesis of a Water-Stable Anionic Uranium-Based Metal-Organic Framework (MOF) with Ultra Large Pores

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• 作者：Dr. Peng Li ; Dr. Nicolaas A. Vermeulen ; Xirui Gong ; Dr. Christos D. Malliakas ; Prof. J. Fraser Stoddart ; Prof. Joseph T. Hupp and Prof. Omar K. Farha
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 22, 2016
• 年：2016
• 卷：55
• 期：35
• 页码：10358-10362
• 全文大小：2563K
• ISSN：1521-3773

文摘

Ionic metal–organic frameworks (MOFs) are a subclass of porous materials that have the ability to incorporate different charged species in confined nanospace by ion-exchange. To date, however, very few examples combining mesoporosity and water stability have been realized in ionic MOF chemistry. Herein, we report the rational design and synthesis of a water-stable anionic mesoporous MOF based on uranium and featuring tbo-type topology. The resulting tbo MOF exhibits exceptionally large open cavities (3.9 nm) exceeding those of all known anionic MOFs. By supercritical CO₂ activation, a record-high Brunauer-Emmett-Teller (BET) surface area (2100 m² g⁻¹) for actinide-based MOFs has been obtained. Most importantly, however, this new uranium-based MOF is water-stable and able to absorb positively charged ions selectively over negatively charged ones, enabling the efficient separation of organic dyes and biomolecules.