Triangular Heteroporous Covalent Organic Framework via a K‐Shaped “Two‐in‐One” Monomer: Targeted Synthesis and Selective Removal of Organic Pollutants

Abstract

Covalent organic frameworks (COFs) have attracted increasing research interest due to their intriguing topological structures and fascinating properties. Diverse COFs with different shapes and sizes are developed by the design of appropriate building blocks. However, the heteroporous COFs to date are still in their infancy due to the relatively limited configuration of precursors. Herein, it is ingeniously designed and synthesized a new K-shaped "two-in-one" building unit (3',6'-bis(4-(5,5-dimethyl-1,3-dixoan-2yl)phenyl)-[1,1':2',1"-terphenyl]-4,4"-diamine, BPTD), thus realizing the construction of triangular dual microporous COF (BPTD-COF) via self-polycondensation of the K-shaped monomer. The super micropore (0.76 nm) of BPTD-COF endows the higher density of amine activity sites, while the other aperture size (1.35 nm) meets the need for accommodating cationic dyes (rhodamine B, methylene blue), thus BPTD-COF displays a distinctive selective adsorption for cationic dyes with good reusability.

Facile synthesis of benzothiadiazole and its derivative-based covalent organic frameworks using “two-in-one” monomers for photocatalytic hydrogen generation

“…[31][32][33][34][35] COFs with various topologies and properties have been facilely constructed by means of the ''twoin-one'' approach. [36][37][38][39][40][41] On the other hand, only a few works have been done to study the light-harvesting range effect on the photocatalytic hydrogen generation performance of COFs, which can be attributed to the limited tunability of light-absorption capacity of organic building units. 42 Therefore, it is important to identify and use suitable organic compounds as models to systematically tune the light-harvesting range of COFs and study the structure-property relationships, which can offer valuable insights for further design and synthesis of COFs with the best photocatalytic performances.…”

“…31–35 COFs with various topologies and properties have been facilely constructed by means of the “two-in-one” approach. 36–41…”