Moran Colton M, Joshi Jayraj N, Marti Robert M, Hayes Sophia E, Walton Krista S
School of Chemical and Biomolecular Engineering , Georgia Institute of Technology , 311 Ferst Drive NW , Atlanta , Georgia 30332 , United States.
Department of Chemistry , Washington University in St. Louis , St. Louis , Missouri 63130 , United States.
J Am Chem Soc. 2018 Jul 25;140(29):9148-9153. doi: 10.1021/jacs.8b04369. Epub 2018 Jul 10.
The conventional synthesis of metal-organic frameworks (MOFs) through soluble metal-salt precursors provides little control over the growth of MOF crystals. The use of alternative metal precursors would provide a more flexible and cost-effective strategy for direction- and shape-controlled MOF synthesis. Here, we demonstrate for the first time the use of insoluble metal-carbon matrices to foster directed growth of MOFs. Aluminum carbide was implemented as both the metal precursor and growth-directing agent for the generation of MIL-53(Al). A unique needle-like morphology of the MOF was grown parallel to the bulk surface in a layer-by-layer manner. Importantly, the synthesis scheme was found to be transferrable to the production of different linker analogues of the MOF and other topologies. Given the variety of metal carbides available, these findings can be used as a blueprint for controlled, efficient, and economical MOF syntheses and set a new milestone toward the industrial use of MOFs at large-scale.
通过可溶性金属盐前驱体常规合成金属有机框架（MOF），对MOF晶体生长的控制作用很小。使用替代金属前驱体将为定向和形状可控的MOF合成提供一种更灵活且具成本效益的策略。在此，我们首次展示了使用不溶性金属碳基质促进MOF的定向生长。碳化铝被用作生成MIL-53(Al)的金属前驱体和生长导向剂。MOF独特的针状形态以逐层方式平行于块状表面生长。重要的是，发现该合成方案可转移用于生产MOF的不同连接体类似物和其他拓扑结构。鉴于现有多种金属碳化物，这些发现可作为可控、高效且经济的MOF合成的蓝图，并为MOF的大规模工业应用树立新的里程碑。
