Extraordinary Separation of Acetylene-Containing Mixtures with Microporous Metal-Organic Frameworks with Open O Donor Sites and Tunable Robustness through Control of the Helical Chain Secondary Building Units
作者:Zizhu Yao、Zhangjing Zhang、Lizhen Liu、Ziyin Li、Wei Zhou、Yunfeng Zhao、Yu Han、Banglin Chen、Rajamani Krishna、Shengchang Xiang
DOI:10.1002/chem.201505107
日期:2016.4.11
task. Here, through the solvothermal reaction of CuI and 5‐triazole isophthalic acid in different solvents, two metal–organic frameworks (MOFs, FJU‐21 and FJU‐22) with open O donor sites and controllable robustness have been obtained for acetylene separation. They contain the same paddle‐wheel Cu2(COO2)4} nodes and metal–ligand connection modes, but with different helical chains as secondary building
乙炔分离是一项非常重要但具有挑战性的工业分离任务。在这里,通过CuI和5-三唑间苯二甲酸在不同溶剂中的溶剂热反应,获得了两个具有开放O供体位点且可控制的鲁棒性的金属有机骨架(MOF,FJU-21和FJU-22)。它们包含相同的桨轮Cu 2(COO 2)4 }节点和金属-配体连接模式,但与次级建筑单元(SBU)具有不同的螺旋链,从而导致MOF的结构坚固性不同。FJU‐21和FJU‐22第一个示例是通过调整螺旋链SBU来控制MOF的鲁棒性。良好的坚固性使活化的FJU-22a比柔性FJU-21a具有更高的表面积和气体吸收量。重要的是,FJU-22a在环境条件下显示出出色的乙炔混合物分离效果。FJU-22 a对50:50 C 2 H 2 / CO 2混合物的分离能力约为高容量HOF-3的两倍,其对C 2 H 2 / C 2 H 4的实际分离选择性在报道的多孔材料中,含1%乙炔的混合物是最高的。根据第一性原理计算,C