Transmission electron microscopy reveals deposition of metal oxide coatings onto metal-organic frameworks

M.S. Denny, L.R. Parent, J.P. Patterson, S.K. Meena, H. Pham, P. Abellan, Q.M. Ramasse, F. Paesani, N.C. Gianneschi, S.M. Cohen

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)


Postsynthetic strategies for modifying metal-organic frameworks (MOFs) have proven to be an incredibly powerful approach for expanding the scope and functionality of these materials. Previously, we reported on the postsynthetic exchange (PSE) of metal ions and ligands in the University of Oslo (UiO) series of MOFs. Detailed characterization by several analytical methods, most notably inductively coupled plasma mass spectrometry and transmission electron microscopy reveal that metal ion deposition on the surface of these MOFs occurs in the form of nanoscale metal oxides, rather than yielding exchanged metal sites within the MOFs, as was previously reported. By contrast, these combined analytical methods do confirm that ligand-based PSE can occur in these MOFs. These findings provide new insight into the postsynthetic manipulation of MOF materials, highlight the importance of rigorously characterizing these materials to correctly assign their composition and structure, and provide a new route to making hybrid solids with a MOF@metal oxide architecture.

Original languageEnglish
Pages (from-to)1348-1357
Number of pages10
JournalJournal of the American Chemical Society
Issue number4
Publication statusPublished - 31 Jan 2018


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