Three-dimensional periodic supramolecular organic framework ion sponge in water and microcrystals

Jia Tian, Tian-You Zhou, Shao-Chen Zhang, Shaul Aloni, Maria Virginia Altoe, Song-Hai Xie, Hui Wang, Dan-Wei Zhang (), Xin Zhao, Yi Liu () and Zhan-Ting Li ()
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Jia Tian: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University
Tian-You Zhou: Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
Shao-Chen Zhang: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University
Shaul Aloni: The Molecular Foundry, Lawrence Berkeley National Laboratory
Maria Virginia Altoe: The Molecular Foundry, Lawrence Berkeley National Laboratory
Song-Hai Xie: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University
Hui Wang: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University
Dan-Wei Zhang: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University
Xin Zhao: Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
Yi Liu: The Molecular Foundry, Lawrence Berkeley National Laboratory
Zhan-Ting Li: Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University

Nature Communications, 2014, vol. 5, issue 1, 1-11

Abstract: Abstract Self-assembly has emerged as a powerful approach to generating complex supramolecular architectures. Despite there being many crystalline frameworks reported in the solid state, the construction of highly soluble periodic supramolecular networks in a three-dimensional space is still a challenge. Here we demonstrate that the encapsulation motif, which involves the dimerization of two aromatic units within cucurbit[8]uril, can be used to direct the co-assembly of a tetratopic molecular block and cucurbit[8]uril into a periodic three-dimensional supramolecular organic framework in water. The periodicity of the supramolecular organic framework is supported by solution-phase small-angle X-ray-scattering and diffraction experiments. Upon evaporating the solvent, the periodicity of the framework is maintained in porous microcrystals. As a supramolecular ‘ion sponge’, the framework can absorb different kinds of anionic guests, including drugs, in both water and microcrystals, and drugs absorbed in microcrystals can be released to water with selectivity.

Date: 2014
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DOI: 10.1038/ncomms6574

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