One Step Backward Is Two Steps Forward: Enhancing the Hydrolysis Rate of UiO-66 by Decreasing [OH-]

Michael J. Katz, Rachel C. Klet, Su Young Moon, Joseph E. Mondloch, Joseph T. Hupp, Omar K. Farha

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The rapid destruction of chemical threats, such as phosphate-based nerve agents, is of considerable current interest. The hydrolysis of the nerve-agent simulant methylparaoxon, as catalyzed by UiO-66 and UiO-67, was examined as a function of pH. Surprisingly, even though typical phosphate-ester hydrolysis mechanisms entail nucleophilic attack of the simulant by aqueous hydroxide, the rate of hydrolysis accelerates as the solution pH is lowered. The unexpected behavior is attributed to a pH-dependent composition change followed by ligand substitution at the Zr6-based node.

Original languageEnglish
Pages (from-to)4637-4642
Number of pages6
JournalACS Catalysis
Volume5
Issue number8
DOIs
Publication statusPublished - Aug 7 2015

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Keywords

  • UiO
  • defects
  • hydrolysis
  • metal-organic frameworks
  • pH
  • phosphate nerve agents

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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