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Switching Adsorbent Layered Material that Enables Stepwise Capture of C8 Aromatics via Single-Crystal-to-Single-Crystal Transformations
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-11-30 , DOI: 10.1021/acs.chemmater.3c01920 Mei-Yan Gao 1 , Shi-Qiang Wang 1, 2 , Andrey A Bezrukov 1 , Shaza Darwish 1 , Bai-Qiao Song 1 , Chenghua Deng 1 , Catiúcia R M O Matos 1 , Lunjie Liu 3 , Boya Tang 4 , Shan Dai 4 , Sihai Yang 4, 5 , Michael J Zaworotko 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-11-30 , DOI: 10.1021/acs.chemmater.3c01920 Mei-Yan Gao 1 , Shi-Qiang Wang 1, 2 , Andrey A Bezrukov 1 , Shaza Darwish 1 , Bai-Qiao Song 1 , Chenghua Deng 1 , Catiúcia R M O Matos 1 , Lunjie Liu 3 , Boya Tang 4 , Shan Dai 4 , Sihai Yang 4, 5 , Michael J Zaworotko 1
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Separation of the C8 aromatic isomers, xylenes (PX, MX, and OX) and ethylbenzene (EB), is important to the petrochemical industry. Whereas physisorptive separation is an energy-efficient alternative to current processes, such as distillation, physisorbents do not generally exhibit strong C8 selectivity. Herein, we report the mixed-linker square lattice (sql) coordination network [Zn2(sba)2(bis)]n·mDMF (sql-4,5-Zn, H2sba or 4 = 4,4′-sulfonyldibenzoic acid, bis or 5 = trans-4,4′-bis(1-imidazolyl)stilbene) and its C8 sorption properties. sql-4,5-Zn was found to exhibit high uptake capacity for liquid C8 aromatics (∼20.2 wt %), and to the best of our knowledge, it is the first sorbent to exhibit selectivity for PX, EB, and MX over OX for binary, ternary, and quaternary mixtures from gas chromatography. Single-crystal structures of narrow-pore, intermediate-pore, and large-pore phases provided insight into the phase transformations, which were enabled by flexibility of the linker ligands and changes in the square grid geometry and interlayer distances. This work adds to the library of two-dimensional coordination networks that exhibit high uptake, thanks to clay-like expansion, and strong selectivity, thanks to shape-selective binding sites, for C8 isomers.
中文翻译：
切换吸附剂层状材料，通过单晶到单晶的转变逐步捕获 C8 芳烃
C 8芳族异构体、二甲苯（PX、MX 和 OX）和乙苯 (EB) 的分离对于石化工业非常重要。尽管物理吸附分离是现有工艺（例如蒸馏）的节能替代方案，但物理吸附剂通常不表现出强的C 8选择性。在此，我们报告了混合连接方晶格（ sql ）协调网络 [Zn 2 (sba) 2 (bis)] n · m DMF ( sql-4,5-Zn , H 2 sba 或4 = 4,4′-磺酰二苯甲酸，双或5 = 反式-4,4′-双(1-咪唑基)二苯乙烯）及其 C 8吸附特性。 sql-4,5-Zn被发现对液体C 8芳烃表现出高吸收能力（∼20.2 wt%），据我们所知，它是第一个对PX、EB和MX表现出选择性的吸附剂OX 用于气相色谱分析的二元、三元和四元混合物。窄孔、中孔和大孔相的单晶结构提供了对相变的深入了解，这是通过连接配体的灵活性以及方形网格几何形状和层间距离的变化来实现的。这项工作增加了二维配位网络库，该网络对 C 8异构体表现出高吸收性（由于粘土状膨胀）和强选择性（由于形状选择性结合位点）。
更新日期：2023-11-30
中文翻译：
切换吸附剂层状材料，通过单晶到单晶的转变逐步捕获 C8 芳烃
C 8芳族异构体、二甲苯（PX、MX 和 OX）和乙苯 (EB) 的分离对于石化工业非常重要。尽管物理吸附分离是现有工艺（例如蒸馏）的节能替代方案，但物理吸附剂通常不表现出强的C 8选择性。在此，我们报告了混合连接方晶格（ sql ）协调网络 [Zn 2 (sba) 2 (bis)] n · m DMF ( sql-4,5-Zn , H 2 sba 或4 = 4,4′-磺酰二苯甲酸，双或5 = 反式-4,4′-双(1-咪唑基)二苯乙烯）及其 C 8吸附特性。 sql-4,5-Zn被发现对液体C 8芳烃表现出高吸收能力（∼20.2 wt%），据我们所知，它是第一个对PX、EB和MX表现出选择性的吸附剂OX 用于气相色谱分析的二元、三元和四元混合物。窄孔、中孔和大孔相的单晶结构提供了对相变的深入了解，这是通过连接配体的灵活性以及方形网格几何形状和层间距离的变化来实现的。这项工作增加了二维配位网络库，该网络对 C 8异构体表现出高吸收性（由于粘土状膨胀）和强选择性（由于形状选择性结合位点）。
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