Ionic Covalent Organic Frameworks: Design of a Charged Interface Aligned on 1D Channel Walls and Its Unusual Electrostatic Functions

Ning Huang, Ping Wang, Matthew A. Addicoat, Thomas Heine, Donglin Jiang

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

Covalent organic frameworks (COFs) have emerged as a tailor-made platform for designing layered two-dimensional polymers. However, most of them are obtained as neutral porous materials. Here, we report the construction of ionic crystalline porous COFs with positively charged walls that enable the creation of well aligned yet spatially confined ionic interface. The unconventional reversed AA-stacking mode alternately orientates the cationic centers to both sides of the walls; the ionic interface endows COFs with unusual electrostatic functions. Because all of the walls are decorated with electric dipoles, the uptake of CO2 is enhanced by three fold compared to the neutral analog. By virtue of sufficient open space between cations, the ionic interface exhibits exceptional accessibility, efficiency, and selectivity in ion exchange to trap anionic pollutants. These findings suggest that construction of the ionic interface of COFs offers a new way to structural and functional designs.

Original languageEnglish
Pages (from-to)4982-4986
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number18
DOIs
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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