首页|Selective separation of pyrene from mixed polycyclic aromatic hydrocarbons by a hexahedral metal-organic cage

Selective separation of pyrene from mixed polycyclic aromatic hydrocarbons by a hexahedral metal-organic cage

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Polycyclic aromatic hydrocarbons(PAHs)play an important role in the industry,and the development of new materials for the selective separation of PAHs is of great significance.In this work,we report a hex-ahedral metal-organic cage with low symmetry by subcomponent self-assembly.In this cage,the eight ZnⅡ centers adopt an interesting ∧∧/△△△△△△ or ∧∧∧∧∧∧/△△ configuration.This cage with a cav-ity volume of 520 Å3 can bind anthracene,phenanthrene,and pyrene to form 1:1 host-guest complexes,while the bigger triphenylene,chrysene,perylene,and coronene cannot be encapsulated.The binding constant Ka of pyrene is about 1.110 x 103(mol/L)-1,which is more than an order of magnitude larger than that of anthracene and phenanthrene(111(mol/L)-1,277(mol/L)-1,respectively).X-ray structure studies reveal that the pyrene is located in the cavity and stabilized by multiple C-H---π interactions.After separation from a mixture of PAHs,pyrene with＞96.1％purity can be obtained.This work provides a useful method for the first time for the selective separation of pyrene from PAHs mixture by utiliz-ing a metal-organic cage as the material,making it a useful tool for purifying and separating specific compounds from complex mixtures.

Polycyclic aromatic hydrocarbonsMetal-organic cageHost-guest chemistrySelective separation

Ya-Liang Lai、Juan Su、Le-Xiong Wu、Dong Luo、Xue-Zhi Wang、Xian-Chao Zhou、Chuang-Wei Zhou、Xiao-Ping Zhou、Dan Li

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College of Chemistry and Materials Science,Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications,Jinan University,Guangzhou 510632,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Guangdong Major Project of Basic and Applied Research广东省自然科学基金Guangzhou Science and Technology Program中央高校基本科研业务费专项中国博士后科学基金Jinan University

22171106217310022197510421871172222011012019B0303020092022A1515011937202002030411216221032022M711327

2024

10.1016/j.cclet.2023.108326

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(1)
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