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Journal Article

Topochemical conversion of an imine-into a thiazole-linked covalent organic framework enabling real structure analysis

MPS-Authors
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Haase,  F.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

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Duppel,  V.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Lotsch,  B. V.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Haase, F., Troschke, E., Savasci, G., Banerjee, T., Duppel, V., Dörfler, S., et al. (2018). Topochemical conversion of an imine-into a thiazole-linked covalent organic framework enabling real structure analysis. Nature Communications, 9: 2600.


Cite as: https://hdl.handle.net/21.11116/0000-000E-D38C-6
Abstract
Stabilization of covalent organic frameworks (COFs) by post-synthetic locking strategies is a powerful tool to push the limits of COF utilization, which are imposed by the reversible COF linkage. Here we introduce a sulfur-assisted chemical conversion of a two-dimensional imine-linked COF into a thiazole-linked COF, with full retention of crystallinity and porosity. This post-synthetic modification entails significantly enhanced chemical and electron beam stability, enabling investigation of the real framework structure at a high level of detail. An in-depth study by electron diffraction and transmission electron microscopy reveals a myriad of previously unknown or unverified structural features such as grain boundaries and edge dislocations, which are likely generic to the in-plane structure of 2D COFs. The visualization of such real structural features is key to understand, design and control structure-property relationships in COFs, which can have major implications for adsorption, catalytic, and transport properties of such crystalline porous polymers.