Preißler-Kurzhöfer Hannes, Lange Marcus, Möllmer Jens, Erhart Oliver, Kobalz Merten, Krautscheid Harald, Gläser Roger
Institut für Technische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Linnéstraße 3, D-04103 Leipzig, Germany.
Institut für Nichtklassische Chemie e.V., Universität Leipzig, Permoserstraße 15, D-04318 Leipzig, Germany.
Nanomaterials (Basel). 2024 Jan 23;14(3):241. doi: 10.3390/nano14030241.
Single gas sorption experiments with the C4-hydrocarbons -butane, -butane, 1-butene and -butene on the flexible MOFs and were carried out with both thermodynamic equilibrium and overall sorption kinetics. Subsequent static binary gas mixture experiments of -butane and -butane unveil a complex dependence of the overall selectivity on sorption enthalpy, rate of structural transition as well as steric effects. A thermodynamic separation favoring -butane as well as kinetic separation favoring -butane are possible within while complete size exclusion of -butane is achieved in This proof-of-concept study shows that the structural flexibility offers additional levers for the precise modulation of the separation mechanisms for complex mixtures with similar chemical and physical properties with real selectivities of >10.
使用C4碳氢化合物（正丁烷、异丁烷、1-丁烯和2-丁烯）在柔性金属有机框架材料上进行了单气体吸附实验，研究了热力学平衡和整体吸附动力学。随后进行的正丁烷和异丁烷的静态二元气体混合物实验揭示了整体选择性对吸附焓、结构转变速率以及空间效应的复杂依赖性。在[具体材料1]中，可能实现有利于正丁烷的热力学分离以及有利于异丁烷的动力学分离，而在[具体材料2]中可实现对正丁烷的完全尺寸排斥。这一概念验证研究表明，结构灵活性为精确调节具有相似化学和物理性质的复杂混合物的分离机制提供了额外手段，实际选择性大于10。
