4.7 Article

Exploring the Bronsted acidity of UiO-66 (Zr, Ce, Hf) metal-organic frameworks for efficient solketal synthesis from glycerol acetalization

Journal

DALTON TRANSACTIONS
Volume 48, Issue 3, Pages 843-847

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt03512a

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Funding

  1. Science and Engineering Research Board, Govt. of India [ECR/2015/000350]
  2. Department of Science Technology (DST) [IFA-14/CH-166]

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Zr, Ce, Hf-based isostructural UIO-66 MOFs exhibited varying degree of Bronsted acidity (UiO-66(Hf) > UiO-66(Ce) > UiO-66(Zr)) on their secondary building units owing to the differences in their oxophilities. UIO-66(Hf) showed remarkable catalytic activity for solketal synthesis with a turnover frequency as high as 13 886 h(-1), which is 90 times higher than that of UiO-66(Zr) and several orders of magnitude higher than that of H2SO4 or Zeolites.

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