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Novel Pillared-Layer-like Metal–Organic Frameworks with Quadrilateral Channels for Efficient Separation of C2H2 from C2H2/CO2 and C2H2/C2H4 Mixtures
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-05-18 , DOI: 10.1021/acs.cgd.3c00153 Wanrong He 1 , Xiao-Bing Mu 1 , Jiao Lei 1 , Wenyu Yuan 1 , Peng Zhang 1 , Quan-Guo Zhai 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-05-18 , DOI: 10.1021/acs.cgd.3c00153 Wanrong He 1 , Xiao-Bing Mu 1 , Jiao Lei 1 , Wenyu Yuan 1 , Peng Zhang 1 , Quan-Guo Zhai 1
Affiliation
The selective separation of C2H2 from C2H2/CO2 and C2H2/C2H4 is crucial but remains incredibly challenging due to their extremely similar physical characteristics and nearly equivalent molecular kinetic diameters. Here, four novel pillared-layer-like metal–organic frameworks (MOFs) with quadrilateral channels, SNNU-283–286, which consist of a unique two-dimensional wave layer and carboxylic acid ligands as columns, are successfully synthesized via a facile solvothermal process. Interestingly, with the decrease of the bent angle between two −COOH groups in ligands, the distortion of the quadrilateral channel increases, and the two-dimensional wave layer becomes more curving. The optimized SNNU-285 with appropriate structural distortion exhibits remarkably high C2H2 adsorption capacity (124.6 cm3 g–1), superior selectivity (20.2), and enhanced breakthrough interval times (21.6 min g–1 at 273 K) for C2H2/CO2 due to the exposed open metal site and the polar furan ring. This work offers novel pillared-layer-like MOFs with quadrilateral channels for efficient C2H2 adsorption and purification.
中文翻译:
具有四边形通道的新型柱状层状金属-有机骨架可从 C2H2/CO2 和 C2H2/C2H4 混合物中高效分离 C2H2
C 2 H 2与C 2 H 2 /CO 2和C 2 H 2 /C 2 H 4的选择性分离是至关重要的,但由于它们极其相似的物理特性和几乎相等的分子动力学直径,它们仍然具有极大的挑战性。在这里,通过简便的溶剂热法成功合成了四种具有四边形通道的新型柱状层状金属有机骨架 (MOF) SNNU-283-286,其由独特的二维波层和羧酸配体作为柱组成过程。有趣的是,随着配体中两个-COOH基团之间弯曲角度的减小,四边形通道的变形增加,二维波层变得更加弯曲。具有适当结构变形的优化 SNNU-285 表现出非常高的 C 2 H 2吸附容量(124.6 cm 3 g –1)、优异的选择性 (20.2),以及由于暴露的开放金属位点和极性呋喃环而增加的 C 2 H 2 /CO 2的突破间隔时间(273 K 时为 21.6 min g –1 )。这项工作提供了具有四边形通道的新型柱状层状 MOF,可实现高效的 C 2 H 2吸附和纯化。
更新日期:2023-05-18
中文翻译:
具有四边形通道的新型柱状层状金属-有机骨架可从 C2H2/CO2 和 C2H2/C2H4 混合物中高效分离 C2H2
C 2 H 2与C 2 H 2 /CO 2和C 2 H 2 /C 2 H 4的选择性分离是至关重要的,但由于它们极其相似的物理特性和几乎相等的分子动力学直径,它们仍然具有极大的挑战性。在这里,通过简便的溶剂热法成功合成了四种具有四边形通道的新型柱状层状金属有机骨架 (MOF) SNNU-283-286,其由独特的二维波层和羧酸配体作为柱组成过程。有趣的是,随着配体中两个-COOH基团之间弯曲角度的减小,四边形通道的变形增加,二维波层变得更加弯曲。具有适当结构变形的优化 SNNU-285 表现出非常高的 C 2 H 2吸附容量(124.6 cm 3 g –1)、优异的选择性 (20.2),以及由于暴露的开放金属位点和极性呋喃环而增加的 C 2 H 2 /CO 2的突破间隔时间(273 K 时为 21.6 min g –1 )。这项工作提供了具有四边形通道的新型柱状层状 MOF,可实现高效的 C 2 H 2吸附和纯化。