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Improved Synthesis of β-Ketoenamine-Linked Covalent Organic Frameworks via Monomer Exchange Reactions

submitted on 10.11.2018, 17:18 and posted on 13.11.2018, 15:04 by Michael Daugherty, Edon Vitaku, Rebecca Li, Austin Evans, Anton Chavez, William Dichtel

β-ketoenamine-linked covalent organic frameworks (COFs) offer excellent structural versatility and outstanding aqueous stability, but their less dynamic linkages complicate obtaining samples with high crystallinity and surface areas that approach theoretical values. In contrast, imine-linked COFs are often isolated with superior materials quality. Here we synthesize several β- ketoenamine-linked COFs, including two unreported structures, with unmatched crystallinity and high surface areas by preparing the topologically equivalent imine-linked COF and exchanging its triformylbenzene monomers with triformylphloroglucinol.


ARO W911NF-15-1-0447 (WRD), NSF NNCI-1542205, NSF ECCS1542205, NSF DGE-1324585 (AME).


Email Address of Submitting Author


Northwestern University



ORCID For Submitting Author


Declaration of Conflict of Interest

There are no conflicts to declare.