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Oxidation of ethane to ethanol by N2O in a metal–organic framework with coordinatively unsaturated iron(II) sites [Oxidation of ethane to ethanol by nitrous oxide in a metal–organic framework with coordinatively unsaturated iron(II) sites]

Journal Article · · Nature Chemistry
DOI:https://doi.org/10.1038/nchem.1956· OSTI ID:1458980
 [1];  [2];  [2];  [3];  [4];  [5];  [5];  [5];  [5];  [3];  [6];  [6];  [3];  [6];  [5];  [5];  [7];  [8]
  1. Univ. of California, Berkeley, CA (United States); University of Minnesota Nanoporous Materials Genome Center
  2. Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. Univ. of Minnesota, Minneapolis, MN (United States)
  6. Univ. of Turin, Torino (Italy)
  7. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Delaware, Newark, DE (United States)
  8. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Enzymatic heme and non-heme high-valent iron-oxo species are known to activate strong C–H bonds with relative ease, yet duplicating this reactivity in a synthetic system remains a formidable challenge. While the instability of the terminal iron-oxo moiety is perhaps the foremost obstacle, steric and electronic factors also limit the activity of previously reported mononuclear iron(IV)-oxo compounds. In particular, while nature’s non-heme iron(IV)-oxos possess high-spin S = 2 ground states, this electronic configuration has proven difficult to achieve in a molecular species. These challenges may be mitigated within metal-organic frameworks featuring site-isolated iron centers in a constrained, weak-field ligand environment. As a result, we show that the metal-organic framework Fe2(dobdc) and its magnesium-diluted analogue, Fe0.1Mg1.9(dobdc), are able to convert ethane into ethanol and acetaldehyde using nitrous oxide as the terminal oxidant. Electronic structure calculations indicate that the active oxidant is likely a high-spin S = 2 iron(IV)-oxo species.
Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0008688
OSTI ID:
1458980
Alternate ID(s):
OSTI ID: 1140209
Journal Information:
Nature Chemistry, Journal Name: Nature Chemistry Journal Issue: 7 Vol. 6; ISSN 1755-4330
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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