Crystalline Covalent Organic Frameworks with Hydrazone Linkages
Fernando J. Uribe‐Romo(University of California, Los Angeles), Christian J. Doonan(University of California, Los Angeles), Hiroyasu Furukawa(University of California, Los Angeles), Kounosuke Oisaki(University of California, Los Angeles), Omar M. Yaghi(University of California, Los Angeles)
Cited by 960
Abstract
Condensation of 2,5-diethoxyterephthalohydrazide with 1,3,5-triformylbenzene or 1,3,5-tris(4-formylphenyl)benzene yields two new covalent organic frameworks, COF-42 and COF-43, in which the organic building units are linked through hydrazone bonds to form extended two-dimensional porous frameworks. Both materials are highly crystalline, display excellent chemical and thermal stability, and are permanently porous. These new COFs expand the scope of possibilities for this emerging class of porous materials.
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