无孔自适应柱芳烃晶体中卤代烯烃异构体的选择性
- Selectivity of Haloalkene Isomers in Nonporous Adaptive Pillararene Crystals.
作者信息
Zhou Yujuan, Jie Kecheng, Zhao Run, Huang Feihe
机构信息
State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China.
出版信息
J Am Chem Soc. 2019 Jul 31;141(30):11847-11851. doi: 10.1021/jacs.9b06188. Epub 2019 Jul 19.
The separation of haloalkene - isomers is difficult to achieve, yet highly desired in the chemical industry. Here, we report an energy-efficient adsorptive separation of 1,4-dichloro-2-butene (DCB) - isomers using nonporous adaptive crystals of perethylated pillararenes. Adaptive perethylated pillar[6]arene (EtP6) crystals separate the -DCB isomer from its isomer with high selectivity while perethylated pillar[5]arene (EtP5) crystals adsorb - DCB isomers without selectivity. The selectivity of EtP6 derives from the difference in the thermodynamic stabilities of guest-loaded EtP6 crystal structures upon capture of - DCB isomers, while the structural similarity of guest-loaded EtP5 leads to the loss of selectivity. EtP6 is highly recyclable due to the reversible transformations between guest-free and guest-loaded structures.
卤代烯烃异构体的分离很难实现，但在化学工业中却备受期待。在此，我们报道了一种使用全乙基化柱芳烃的无孔自适应晶体对1,4 - 二氯 - 2 - 丁烯（DCB）异构体进行节能吸附分离的方法。自适应全乙基化柱[6]芳烃（EtP6）晶体能以高选择性从其异构体中分离出 - DCB异构体，而全乙基化柱[5]芳烃（EtP5）晶体对 - DCB异构体的吸附则没有选择性。EtP6的选择性源于捕获 - DCB异构体时客体负载的EtP6晶体结构在热力学稳定性上的差异，而客体负载的EtP5的结构相似性导致了选择性的丧失。由于在无客体和客体负载结构之间的可逆转变，EtP6具有高度可回收性。
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