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Ionothermal Synthesis of Imide-Linked Covalent Organic Frameworks

Maschita, J.; Banerjee, T.; Savasci, G.; Haase, F.; Ochsenfeld, C.; Lotsch, B. V.


Covalent organic frameworks (COFs) are an extensively studied class of porous materials, which distinguish themselves from other porous polymers in their crystallinity and high degree of modularity, enabling a wide range of applications. COFs are most commonly synthesized solvothermally, which is often a time‐consuming process and restricted to well‐soluble precursor molecules. Synthesis of polyimide‐linked COFs (PI‐COFs) is further complicated by the poor reversibility of the ring‐closing reaction under solvothermal conditions. Herein, we report the ionothermal synthesis of crystalline and porous PI‐COFs in zinc chloride and eutectic salt mixtures. This synthesis does not require soluble precursors and the reaction time is significantly reduced as compared to standard solvothermal synthesis methods. In addition to applying the synthesis to previously reported imide COFs, a new perylene‐based COF was also synthesized, which could not be obtained by the classical solvothermal route. In situ high‐temperature XRPD analysis hints to the formation of precursor–salt adducts as crystalline intermediates, which then react with each other to form the COF.

Verlagsausgabe §
DOI: 10.5445/IR/1000123302
Veröffentlicht am 07.09.2020
DOI: 10.1002/ange.202007372
Zitationen: 21
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0044-8249, 0932-2140, 1521-3757
KITopen-ID: 1000123302
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Angewandte Chemie
Verlag John Wiley and Sons
Band 132
Heft 36
Seiten 15880-15888
Nachgewiesen in Dimensions
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