Gating Effects for Ion Transport in Three-Dimensional Functionalized Covalent Organic Frameworks

Xiuqin Yu (1) , Cuiyan Li (1) , Jianhong Chang (1) , Yujie Wang (2) , Weifeng Xia (1) , Jinquan Suo (1) , Xinyu Guan (1) , Valentin Valtchev (3) , Yushan Yan (4) , Shilun Qiu (1) , Qianrong Fang (1)

1 JLU - Jilin University
2 Shanghai Jiao Tong University [Shanghai]
3 LCS - Laboratoire catalyse et spectrochimie
4 University of Delaware [Newark]

The development of bioinspired nano/subnano-sized (<2 nm) ion channels is still considered a great challenge due to the difficulty in precisely controlling pore's internal structure and chemistry. Herein, for the first time, we report that three-dimensional functionalized covalent organic frameworks (COFs) can act as an effective nanofluidic platform for intelligent modulation of the ion transport. By strategic attachment of 12-crown-4 groups to the monomers as ion-driver door locks, we demonstrate that gating effects of functionalized COFs can be activated by lithium ions. The obtained materials exhibit an outstanding selective ion transmission performance with a high gating ratio (up to 23.6 for JUC-590), which is among the highest values in metal ion-activated solid-state nanochannels reported so far. Furthermore, JUC-590 offers high tunability, selectivity, and recyclability of ion transport proved by the experimental and simulated studies.

Domaines: Matériaux

Xiuqin Yu, Cuiyan Li, Jianhong Chang, Yujie Wang, Weifeng Xia, et al.. Gating Effects for Ion Transport in Three-Dimensional Functionalized Covalent Organic Frameworks. Angewandte Chemie International Edition, 2022, 61 (13), pp.e202200820. ⟨10.1002/anie.202200820⟩. ⟨hal-03611548⟩