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

preprint
submitted on 10.11.2018 and posted on 13.11.2018 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.

Funding

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

History

Email Address of Submitting Author

vitaku@northwestern.edu

Institution

Northwestern University

Country

USA

ORCID For Submitting Author

0000-0002-0057-4245

Declaration of Conflict of Interest

There are no conflicts to declare.

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