Separation of p-Xylene from C8 Alkylaromatics by Nonporous Adaptive Crystals of Leggero Pillar[4]arene[1]quinone,ACS Materials Letters

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Separation of p-Xylene from C8 Alkylaromatics by Nonporous Adaptive Crystals of Leggero Pillar[4]arene[1]quinone
ACS Materials Letters ( IF 9.6 ) Pub Date : 2023-12-29 , DOI: 10.1021/acsmaterialslett.3c01250
Ge Zhang ₁ , Kun Zhang ₁ , Xin-Yue Lou ₁ , Xin Li ₁ , Chun-Li Song ₁ , Weiwei Huan ₂ , Ying-Wei Yang ₁

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The separation and purification of C8 aromatics under nonthermal conditions remain a significant challenge in the chemical industry. Here, we report a new leggero pillararene containing one benzoquinone unit, namely, leggero pillar[4]arene[1]quinone (P[4]Q[1]L), which exhibits excellent guest sorting ability and vapochromic properties. Nonporous adaptive crystals (NACs) of P[4]Q[1]L can adsorb p-xylene from equal volume mixtures of C8 aromatics with high purity (97.5%), along with a color change from red to black. Single-crystal structures and powder X-ray diffraction data reveal that the high selectivity is attributed to the fact that p-xylene can trigger the structural rearrangement of P[4]Q[1]L NACs and form the corresponding host–guest assembly in the solid state. Moreover, P[4]Q[1]L NACs material is highly recyclable, because of the reversible transformation between guest-free and guest-loaded structures.

中文翻译：

Leggero Pillar[4]芳烃[1]醌无孔自适应晶体从 C8 烷基芳烃中分离对二甲苯

非热条件下 C8 芳烃的分离和纯化仍然是化学工业中的重大挑战。在这里，我们报道了一种含有一个苯醌单元的新型leggero柱芳烃，即leggero柱芳烃[1]醌（P[4]Q[1]L），它表现出优异的客体分选能力和气色性能。P[4]Q[1]L的无孔自适应晶体（NAC）可以从等体积的C8芳烃混合物中吸附高纯度（97.5%）的对二甲苯，并且颜色从红色变为黑色。单晶结构和粉末X射线衍射数据表明，高选择性归因于对二甲苯可以触发P[4]Q[1]L NACs的结构重排并在其中形成相应的主客体组装。固态。此外，由于无客体结构和载客体结构之间的可逆转变，P[4]Q[1]L NACs材料具有高度可回收性。

更新日期：2023-12-29

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