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Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations

The lithium salt of the binuclear nitrido complex of ruthenium (IV) Li(3)(Ru(2)NCl(8)·2H(2)O) was synthesized. Using UV spectroscopy and voltammetry, we studied complex behavior in aqueous solutions. It was found that in dilute solutions of this compound, Cl(−) ions are replaced by H(2)O molecules,...

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Autores principales: Dzhabieva, Zinaida M., Shilov, Gennady V., Avdeeva, Lidia V., Dobrygin, Vladislav V., Tkachenko, Virineya Yu., Dzhabiev, Taimuraz S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7148475/
https://www.ncbi.nlm.nih.gov/pubmed/31963106
http://dx.doi.org/10.3390/biomimetics5010003
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author Dzhabieva, Zinaida M.
Shilov, Gennady V.
Avdeeva, Lidia V.
Dobrygin, Vladislav V.
Tkachenko, Virineya Yu.
Dzhabiev, Taimuraz S.
author_facet Dzhabieva, Zinaida M.
Shilov, Gennady V.
Avdeeva, Lidia V.
Dobrygin, Vladislav V.
Tkachenko, Virineya Yu.
Dzhabiev, Taimuraz S.
author_sort Dzhabieva, Zinaida M.
collection PubMed
description The lithium salt of the binuclear nitrido complex of ruthenium (IV) Li(3)(Ru(2)NCl(8)·2H(2)O) was synthesized. Using UV spectroscopy and voltammetry, we studied complex behavior in aqueous solutions. It was found that in dilute solutions of this compound, Cl(−) ions are replaced by H(2)O molecules, and the intra-sphere redox reaction between Ru (IV) and H(2)O, as well as the oxidation of water with the formation of oxygen and the acidic dissociation of coordinated water molecules also have been taking place. It was established by IR spectroscopy and ESI mass spectrometric analysis that not only the binuclear structure of the complex is preserved in acidic solutions, but also its dimerization product into the tetra-ruthenium dinitrido cluster Ru(4)N(2)O(5)(+), which is a catalyst for the water oxidation reaction. The activity of the catalyst was TOF = 0.33 s(−1), TON = 304.
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spelling pubmed-71484752020-04-21 Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations Dzhabieva, Zinaida M. Shilov, Gennady V. Avdeeva, Lidia V. Dobrygin, Vladislav V. Tkachenko, Virineya Yu. Dzhabiev, Taimuraz S. Biomimetics (Basel) Article The lithium salt of the binuclear nitrido complex of ruthenium (IV) Li(3)(Ru(2)NCl(8)·2H(2)O) was synthesized. Using UV spectroscopy and voltammetry, we studied complex behavior in aqueous solutions. It was found that in dilute solutions of this compound, Cl(−) ions are replaced by H(2)O molecules, and the intra-sphere redox reaction between Ru (IV) and H(2)O, as well as the oxidation of water with the formation of oxygen and the acidic dissociation of coordinated water molecules also have been taking place. It was established by IR spectroscopy and ESI mass spectrometric analysis that not only the binuclear structure of the complex is preserved in acidic solutions, but also its dimerization product into the tetra-ruthenium dinitrido cluster Ru(4)N(2)O(5)(+), which is a catalyst for the water oxidation reaction. The activity of the catalyst was TOF = 0.33 s(−1), TON = 304. MDPI 2020-01-16 /pmc/articles/PMC7148475/ /pubmed/31963106 http://dx.doi.org/10.3390/biomimetics5010003 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Dzhabieva, Zinaida M.
Shilov, Gennady V.
Avdeeva, Lidia V.
Dobrygin, Vladislav V.
Tkachenko, Virineya Yu.
Dzhabiev, Taimuraz S.
Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title_full Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title_fullStr Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title_full_unstemmed Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title_short Biomimetic Water Oxidation Catalyzed by a Binuclear Ruthenium (IV) Nitrido-Chloride Complex with Lithium Counter-Cations
title_sort biomimetic water oxidation catalyzed by a binuclear ruthenium (iv) nitrido-chloride complex with lithium counter-cations
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7148475/
https://www.ncbi.nlm.nih.gov/pubmed/31963106
http://dx.doi.org/10.3390/biomimetics5010003
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