Linear Positional Isomer Sorting in Nonporous Adaptive Crystals of a Pillar[5]arene

Here we show a new adsorptive separation
approach using nonporous
adaptive crystals of a pillar[5]­arene. Desolvated perethylated pillar[5]­arene
crystals (EtP5α) with a nonporous character selectively
adsorb 1-pentene (1-Pe) over its positional isomer 2-pentene
(2-Pe), leading to a structural change from EtP5α to 1-Pe loaded structure (1-Pe@EtP5). The purity of 1-Pe reaches 98.7% in just
one cycle and EtP5α can be reused without losing
separation performance.

本研究展示了一种新型吸附分离方法，该方法采用了一种非多孔性自适应晶体的柱状[5]芳烃。去溶剂化的乙基化柱状[5]芳烃晶体（EtP5α）具有非多孔性，可选择性吸附1-戊烯（1-Pe）相对于其位置异构体2-戊烯（2-Pe），从而引起结构从EtP5α向负载1-Pe的结构（1-Pe@EtP5）的转变。在仅一个循环中，1-Pe的纯度即可达到98.7%，且EtP5α可重复使用而不损失分离性能。