Reactive high-spin iron(IV)-oxo sites through dioxygen activation in a metal–organic framework

Author:

Hou Kaipeng12ORCID,Börgel Jonas12ORCID,Jiang Henry Z. H.1ORCID,SantaLucia Daniel J.34ORCID,Kwon Hyunchul1ORCID,Zhuang Hao56,Chakarawet Khetpakorn7ORCID,Rohde Rachel C.1ORCID,Taylor Jordan W.1ORCID,Dun Chaochao8ORCID,Paley Maria V.12ORCID,Turkiewicz Ari B.1ORCID,Park Jesse G.1ORCID,Mao Haiyan5ORCID,Zhu Ziting26ORCID,Alp E. Ercan9ORCID,Zhao Jiyong9ORCID,Hu Michael Y.9ORCID,Lavina Barbara910ORCID,Peredkov Sergey3ORCID,Lv Xudong1ORCID,Oktawiec Julia11ORCID,Meihaus Katie R.1,Pantazis Dimitrios A.4ORCID,Vandone Marco12ORCID,Colombo Valentina1213ORCID,Bill Eckhard3,Urban Jeffrey J.28ORCID,Britt R. David714ORCID,Grandjean Fernande15ORCID,Long Gary J.15ORCID,DeBeer Serena3ORCID,Neese Frank4ORCID,Reimer Jeffrey A.25ORCID,Long Jeffrey R.125ORCID

Affiliation:

1. Department of Chemistry, University of California, Berkeley, CA 94720, USA.

2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

3. Max Planck Institute for Chemical Energy Conversion, D-45470 Mülheim an der Ruhr, Germany.

4. Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany.

5. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA.

6. Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA.

7. Department of Chemistry, University of California, Davis, CA 95616, USA.

8. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

9. Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA.

10. Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637, USA.

11. Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.

12. Department of Chemistry, University of Milan, 20133 Milan, Italy.

13. Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), UdR Milano, Via Golgi 19, 20133 Milano, Italy.

14. Miller Institute for Basic Research in Science, University of California, Berkeley CA 94720, USA

15. Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, MO 65409, USA.

Abstract

In nature, nonheme iron enzymes use dioxygen to generate high-spin iron(IV)=O species for a variety of oxygenation reactions. Although synthetic chemists have long sought to mimic this reactivity, the enzyme-like activation of O 2 to form high-spin iron(IV)=O species remains an unrealized goal. Here, we report a metal–organic framework featuring iron(II) sites with a local structure similar to that in α-ketoglutarate-dependent dioxygenases. The framework reacts with O 2 at low temperatures to form high-spin iron(IV)=O species that are characterized using in situ diffuse reflectance infrared Fourier transform, in situ and variable-field Mössbauer, Fe Kβ x-ray emission, and nuclear resonance vibrational spectroscopies. In the presence of O 2 , the framework is competent for catalytic oxygenation of cyclohexane and the stoichiometric conversion of ethane to ethanol.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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