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Hydrogen-bonding and π-π interaction promoted solution-processable covalent organic frameworks
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Hydrogen-bonding and π-π interaction promoted solution-processable covalent organic frameworks
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Journal Article
Hydrogen-bonding and π-π interaction promoted solution-processable covalent organic frameworks
2023
Overview
Covalent organic frameworks show great potential in gas adsorption/separation, biomedicine, device, sensing, and printing arenas. However, covalent organic frameworks are generally not dispersible in common solvents resulting in the poor processability, which severely obstruct their application in practice. In this study, we develop a convenient top-down process for fabricating solution-processable covalent organic frameworks by introducing intermolecular hydrogen bonding and π-π interactions from ionic liquids. The bulk powders of imine-linked, azine-linked, and
β
-ketoenamine linked covalent organic frameworks can be dispersed homogeneously in optimal ionic liquid 1-methyl-3-octylimidazolium bromide after heat treatment. The resulting high-concentration colloids are utilized to create the covalent organic framework inks that can be directly printed onto the surface. Molecular dynamics simulations and the quantum mechanical calculations suggest that C‒H···π and π-π interaction between ionic liquid cations and covalent organic frameworks may promote the formation of colloidal solution. These findings offer a roadmap for preparing solution-processable covalent organic frameworks, enabling their practical applications.
Covalent organic frameworks are generally not dispersible in common solvents resulting in the poor processability which limits their practical application. Here, the authors develop a top-down process to produce solution-processable covalent organic frameworks based on the assistance of ionic liquids by means of intermolecular hydrogen bonding and π-π interactions.
