A new post-synthetic polymerization strategy makes metal-organic frameworks more stable.
Journal
Chemical science
ISSN: 2041-6520
Titre abrégé: Chem Sci
Pays: England
ID NLM: 101545951
Informations de publication
Date de publication:
07 May 2019
07 May 2019
Historique:
received:
09
01
2019
accepted:
25
03
2019
entrez:
25
5
2019
pubmed:
28
5
2019
medline:
28
5
2019
Statut:
epublish
Résumé
Metal-organic frameworks are of interest in a number of host-guest applications. However, their weak coordination bonding often leads to instability in aqueous environments, particularly at extreme pH, and hence, is a challenging topic in the field. In this work, a two-step, post-synthetic polymerization method is used to create a series of highly hydrophobic, stable MOF composites. The MOFs are first coated with thin layers of polydopamine from free-base dopamine under a mild oxygen atmosphere, which then undergoes a Michael addition to covalently graft hydrophobic molecules to the external MOF surface. This easy, mild post-synthetic modification is shown to significantly improve the stability of a number of structurally diverse MOFs including HKUST-1 (Cu), ZIF-67 (Co), ZIF-8 (Zn), UiO-66 (Zr), Cu-TDPAT (Cu), Mg-MOF-74 (Mg) and MIL-100 (Fe) in wet, caustic (acidic and basic) environments as determined by powder X-ray diffraction and surface area measurements.
Identifiants
pubmed: 31123563
doi: 10.1039/c9sc00135b
pii: c9sc00135b
pmc: PMC6498544
doi:
Types de publication
Journal Article
Langues
eng
Pagination
4542-4549Références
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