Styrene Purification by Guest-Induced Restructuring of Pillar[6]arene.
Styrene Purification by Guest-Induced Restructuring of Pillar[6]arene.
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通过客体诱导的支柱[6]芳烃重组纯化苯乙烯
DOI：
10.1021/jacs.6b13300
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发表时间：
2017-03-01
影响因子：
15
通讯作者：
Cooper AI
中科院分区：
文献类型：
--
作者：
Jie K;Liu M;Zhou Y;Little MA;Bonakala S;Chong SY;Stephenson A;Chen L;Huang F;Cooper AI
苯乙烯（St）和苯乙烯（EB）混合物的分离在化学工业中是重要的。在这里，我们探讨了两个柱状大环柱[n]芳烃（EtP 5和EtP 6; n = 5和6）的St和EB吸附选择性。结晶和无定形EtP 6都可以以非常高的选择性从St-EB混合物中捕获St。我们表明，EtP 6可用于从50：50 v/v St：EB混合物中分离St，在单个吸附循环中产生纯度> 99%的St。单晶结构，粉末X-射线衍射图案，和分子模拟都表明，这种选择性是由于客人引起的结构变化EtP 6，而不是一个简单的腔/孔径效应。这种重组意味着材料在每次重结晶时都能“自我修复”，并且St分离可以在多个循环中进行，而不会损失性能。
The separation of styrene (St) and ethylbenzene (EB) mixtures is important in the chemical industry. Here, we explore the St and EB adsorption selectivity of two pillar-shaped macrocyclic pillar[n]arenes (EtP5 and EtP6; n = 5 and 6). Both crystalline and amorphous EtP6 can capture St from a St-EB mixture with remarkably high selectivity. We show that EtP6 can be used to separate St from a 50:50 v/v St:EB mixture, yielding in a single adsorption cycle St with a purity of >99%. Single-crystal structures, powder X-ray diffraction patterns, and molecular simulations all suggest that this selectivity is due to a guest-induced structural change in EtP6 rather than a simple cavity/pore size effect. This restructuring means that the material “self-heals” upon each recrystallization, and St separation can be carried out over multiple cycles with no loss of performance.