TMeQ[6]-based supramolecular frameworks assembled through outer surface interactions and their potential applications
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TMeQ[6]-based supramolecular frameworks assembled through outer surface interactions and their potential applications Rui Xue Cheng1, Fei Yang Tian1, Yun Qian Zhang1, Kai Chen2,*, Qian Jiang Zhu1, and Zhu Tao1,* 1
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, People’s Republic of China 2 Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, People’s Republic of China
Received: 30 January 2020
ABSTRACT
Accepted: 28 August 2020
Cucurbit[n]uril(Q[n])-based supramolecular frameworks assembled through outer surface interactions are characterized by their simple composition, convenient preparation, high yields and controllable structures. The most prominent characteristic of these frameworks is their diversity, with various synthesis methods, structural characteristics, structure directing agents and basic building blocks of Q[n]s. In this work, a symmetric tetramethyl-substituted Q[6] (TMeQ[6]) is selected as the basic building block, with three different TMeQ[6]based supramolecular frameworks obtained from 1-, 3- and 5 mol/L aqueous H2SO4 solutions, respectively. The outer surface interactions between TMeQ[6] and the adjacent SO42- anions or TMeQ[6] units are the main driving forces for the formation of these frameworks, which exhibit adsorption properties for fluorophore dyes and organic isomers. These adsorption characteristics may lead to the application of these frameworks in the synthesis of solid fluorescent sensors for volatile organic compounds and the adsorptive separation of alkane isomers.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Yaroslava Yingling.
Address correspondence to E-mail: [email protected]; [email protected]
https://doi.org/10.1007/s10853-020-05180-7
J Mater Sci
GRAPHIC ABSTRACT
Introduction Framework materials are highly diverse and encompass metal–organic frameworks (MOFs) [1, 2], covalent organic frameworks (COFs) [3–5] and supramolecular organic frameworks (SOFs) [5, 6] which find widespread potential usage in adsorption [7, 8], catalysis [8, 9], electrochemical applications [10, 11], bio-related applications, and so on [12–14]. The 2016 Noble Prize in Chemistry focused on supramolecular self-assembly again, and the 2018 Wolf Prize in Chemistry focused on reticular chemistry, which is a great encouragement to researchers working in this field, and suggests that the chemistry of supramolecular frameworks could be noteworthy research direction.
Regardless of the type of framework material, the basic building blocks are very important. As macrocyclic compounds, cucurbit[n]urils (Q[n]s) constructed by n glycolurils bridging through 2n methylenes, have a central empty cavity and two opening portals rimmed with n carbonyl groups, respe
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