Locating Gases in Porous Materials: Cryogenic Loading of Fuel-Related Gases Into a Sc-based Metal-Organic Framework under Extreme Pressures.
Locating Gases in Porous Materials: Cryogenic Loading of Fuel-Related Gases Into a Sc-based Metal-Organic Framework under Extreme Pressures.
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DOI：
10.1002/anie.201506250
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发表时间：
2015-11
影响因子：
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通讯作者：
Jorge Sotelo;C. H. Woodall;D. Allan;E. Gregoryanz;R. Howie;K. Kamenev;M. Probert;P. Wright;S. Moggach
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文献类型：
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作者：
Jorge Sotelo;C. H. Woodall;D. Allan;E. Gregoryanz;R. Howie;K. Kamenev;M. Probert;P. Wright;S. Moggach
报道了一种在高压下用气体分子负载金属有机框架的替代方法。该技术，它使用液化气体作为压力传输介质内的金刚石压砧单元沿着与单晶的多孔金属有机框架，被证明具有相当大的优势，比其他气体加载方法时，调查主客体相互作用。具体而言，加载的金属有机框架Sc2 BDC 3与液化CO2在2千巴揭示了存在三个吸附位点，一个以前未报道，并解决了以前的结构数据和吸附等温线之间的不一致。在3-25 kbar下用超临界CH 4进行的进一步研究表明，Sc2 BDC 3的超填充和两个高压置换和可逆相变被诱导，因为填充的MOF适应于减小系统的体积。
An alternative approach to loading metal organic frameworks with gas molecules at high (kbar) pressures is reported. The technique, which uses liquefied gases as pressure transmitting media within a diamond anvil cell along with a single-crystal of a porous metal-organic framework, is demonstrated to have considerable advantages over other gas-loading methods when investigating host-guest interactions. Specifically, loading the metal-organic framework Sc2BDC3 with liquefied CO2 at 2 kbar reveals the presence of three adsorption sites, one previously unreported, and resolves previous inconsistencies between structural data and adsorption isotherms. A further study with supercritical CH4 at 3-25 kbar demonstrates hyperfilling of the Sc2 BDC3 and two high-pressure displacive and reversible phase transitions are induced as the filled MOF adapts to reduce the volume of the system.