Three-Dimensional Ionic Covalent Organic Frameworks for Rapid, Reversible, and Selective Ion Exchange,Journal of the American Chemical Society

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Three-Dimensional Ionic Covalent Organic Frameworks for Rapid, Reversible, and Selective Ion Exchange
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-11-29 , DOI: 10.1021/jacs.7b11283
Zonglong Li ₁ , Hui Li ₁ , Xinyu Guan ₁ , Junjie Tang ₁ , Yusran Yusran ₁ , Zhan Li ₁ , Ming Xue ₁ , Qianrong Fang ₁ , Yushan Yan ₂ , Valentin Valtchev _{1,

3} , Shilun Qiu ₁

Affiliation

Covalent organic frameworks (COFs) have emerged as functional materials for various potential applications. However, the availability of three-dimensional (3D) COFs is still limited, and nearly all of them exhibit neutral porous skeletons. Here we report a general strategy to design porous positively charged 3D ionic COFs by incorporation of cationic monomers in the framework. The obtained 3D COFs are built of 3-fold interpenetrated diamond net and show impressive surface area and CO2 uptakes. The ion-exchange ability of 3D ionic COFs has been highlighted by reversible removal of nuclear waste model ions and excellent size-selective capture for anionic pollutants. This research thereby provides a new perspective to explore 3D COFs as a versatile type of ion-exchange materials.

中文翻译：

用于快速、可逆和选择性离子交换的三维离子共价有机框架

共价有机框架 (COF) 已成为各种潜在应用的功能材料。然而，三维 (3D) COFs 的可用性仍然有限，并且几乎所有它们都表现出中性多孔骨架。在这里，我们报告了通过在框架中掺入阳离子单体来设计多孔带正电 3D 离子 COF 的一般策略。获得的 3D COF 由 3 重互穿金刚石网构成，并显示出令人印象深刻的表面积和 CO2 吸收。3D 离子 COF 的离子交换能力已通过核废料模型离子的可逆去除和对阴离子污染物的优异尺寸选择性捕获而得到强调。因此，这项研究为探索 3D COF 作为一种通用类型的离子交换材料提供了新的视角。

更新日期：2017-11-29

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