化学
乙苯
金属有机骨架
单斜晶系
结构异构体
四方晶系
极地的
吸附
甲苯
有机化学
计算化学
分子
晶体结构
天文
物理
作者
Jingyi Zhou,Ke Tian,Yu Song,Hongyi Cai,Zhuo'an Wang,Luyao Chen,Qianyu Xu,Zhiguo Zhang,Zongbi Bao,Qilong Ren,Qiwei Yang
摘要
The separation of C8 aromatics (xylenes and ethylbenzene) remains one of the most challenging industrial separations due to their similar structures and properties. Suitable adsorbents that can distinguish the small differences among isomers are urgently demanded. Herein, we demonstrate a strategy to realize the precise discrimination of C8 aromatics by constructing a nonaromatic confined pore environment with mixed polycycloalkane-type ligands. The nonaromatic low-polar pore environment avoids strong convergent interactions between the framework and the common phenyl rings while creating possibilities to amplify the difference between host-guest/guest-guest interactions regarding the different methyl (ethyl) group positions of isomers. The resultant metal-organic framework, ZUL-C3, with either tetragonal or monoclinic lattice, exhibits outstanding separation performance for C8 aromatics, not only realizing the simultaneous separation of four isomers from each other but also setting a benchmark for the dynamic separation performance of OX/PX and OX/MX.
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