Molecular docking sites designed for the generation of highly crystalline covalent organic frameworks

Autor: Markus Döblinger, Karena W. Chapman, Florian Auras, Timothy Clark, Johannes T. Margraf, Laura Ascherl, Torben Sick, Konstantin Karaghiosoff, Christina Hettstedt, Thomas Bein, Mona Calik, Saul H. Lapidus
Rok vydání: 2016
Předmět:
Zdroj: Nature Chemistry. 8:310-316
ISSN: 1755-4349
1755-4330
DOI: 10.1038/nchem.2444
Popis: Covalent organic frameworks (COFs) formed by connecting multidentate organic building blocks through covalent bonds provide a platform for designing multifunctional porous materials with atomic precision. As they are promising materials for applications in optoelectronics, they would benefit from a maximum degree of long-range order within the framework, which has remained a major challenge. We have developed a synthetic concept to allow consecutive COF sheets to lock in position during crystal growth, and thus minimize the occurrence of stacking faults and dislocations. Hereby, the three-dimensional conformation of propeller-shaped molecular building units was used to generate well-defined periodic docking sites, which guided the attachment of successive building blocks that, in turn, promoted long-range order during COF formation. This approach enables us to achieve a very high crystallinity for a series of COFs that comprise tri- and tetradentate central building blocks. We expect this strategy to be transferable to a broad range of customized COFs. Covalent organic frameworks (COFs) are attractive multifunctional porous materials that can be generated with atomic precision. However, endowing them with long-range order—desirable for applications—has remained challenging. Now, propeller-shaped building units have been used that allow consecutive layers to lock in position, resulting in highly crystalline COFs.
Databáze: OpenAIRE
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