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Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance
O−O bond formation with Ru(bda)L(2)‐type catalysts is well‐known to proceed through a bimolecular reaction pathway, limiting the potential application of these catalysts at low concentrations. Herein, we achieved high efficiencies with mononuclear catalysts, with TOFs of 460±32 s(−1) at high catalys...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8251529/ https://www.ncbi.nlm.nih.gov/pubmed/33861495 http://dx.doi.org/10.1002/anie.202101931 |
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author | Timmer, Brian J. J. Kravchenko, Oleksandr Liu, Tianqi Zhang, Biaobiao Sun, Licheng |
author_facet | Timmer, Brian J. J. Kravchenko, Oleksandr Liu, Tianqi Zhang, Biaobiao Sun, Licheng |
author_sort | Timmer, Brian J. J. |
collection | PubMed |
description | O−O bond formation with Ru(bda)L(2)‐type catalysts is well‐known to proceed through a bimolecular reaction pathway, limiting the potential application of these catalysts at low concentrations. Herein, we achieved high efficiencies with mononuclear catalysts, with TOFs of 460±32 s(−1) at high catalyst loading and 31±3 s(−1) at only 1 μM catalyst concentration, by simple structural considerations on the axial ligands. Kinetic and DFT studies show that introduction of an off‐set in the interaction between the two catalytic units reduces the kinetic barrier of the second‐order O−O bond formation, maintaining high catalytic activity even at low catalyst concentrations. The results herein furthermore suggest that π–π interactions may only play a minor role in the observed catalytic activity, and that asymmetry can also rationalize high activity observed for Ru(bda)(isoq)(2) type catalysts and offer inspiration to overcome the limitations of 2nd order catalysis. |
format | Online Article Text |
id | pubmed-8251529 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-82515292021-07-06 Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance Timmer, Brian J. J. Kravchenko, Oleksandr Liu, Tianqi Zhang, Biaobiao Sun, Licheng Angew Chem Int Ed Engl Research Articles O−O bond formation with Ru(bda)L(2)‐type catalysts is well‐known to proceed through a bimolecular reaction pathway, limiting the potential application of these catalysts at low concentrations. Herein, we achieved high efficiencies with mononuclear catalysts, with TOFs of 460±32 s(−1) at high catalyst loading and 31±3 s(−1) at only 1 μM catalyst concentration, by simple structural considerations on the axial ligands. Kinetic and DFT studies show that introduction of an off‐set in the interaction between the two catalytic units reduces the kinetic barrier of the second‐order O−O bond formation, maintaining high catalytic activity even at low catalyst concentrations. The results herein furthermore suggest that π–π interactions may only play a minor role in the observed catalytic activity, and that asymmetry can also rationalize high activity observed for Ru(bda)(isoq)(2) type catalysts and offer inspiration to overcome the limitations of 2nd order catalysis. John Wiley and Sons Inc. 2021-05-19 2021-06-21 /pmc/articles/PMC8251529/ /pubmed/33861495 http://dx.doi.org/10.1002/anie.202101931 Text en © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Timmer, Brian J. J. Kravchenko, Oleksandr Liu, Tianqi Zhang, Biaobiao Sun, Licheng Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title | Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title_full | Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title_fullStr | Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title_full_unstemmed | Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title_short | Off‐Set Interactions of Ruthenium–bda Type Catalysts for Promoting Water‐Splitting Performance |
title_sort | off‐set interactions of ruthenium–bda type catalysts for promoting water‐splitting performance |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8251529/ https://www.ncbi.nlm.nih.gov/pubmed/33861495 http://dx.doi.org/10.1002/anie.202101931 |
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