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Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries

[Image: see text] This paper presents a theoretical and experimental evaluation of benzidine derivatives as electroactive molecules for organic redox flow batteries. These redox indicators are novel electroactive materials that can perform multielectron transfers in aqueous media. We performed the s...

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Autores principales: Flores-Leonar, Martha M., Acosta-Tejada, Gloria, Laguna, Humberto G., Amador-Bedolla, Carlos, Sánchez-Castellanos, Mariano, Ugalde-Saldívar, Víctor M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10500672/
https://www.ncbi.nlm.nih.gov/pubmed/37720753
http://dx.doi.org/10.1021/acsomega.3c02297
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author Flores-Leonar, Martha M.
Acosta-Tejada, Gloria
Laguna, Humberto G.
Amador-Bedolla, Carlos
Sánchez-Castellanos, Mariano
Ugalde-Saldívar, Víctor M.
author_facet Flores-Leonar, Martha M.
Acosta-Tejada, Gloria
Laguna, Humberto G.
Amador-Bedolla, Carlos
Sánchez-Castellanos, Mariano
Ugalde-Saldívar, Víctor M.
author_sort Flores-Leonar, Martha M.
collection PubMed
description [Image: see text] This paper presents a theoretical and experimental evaluation of benzidine derivatives as electroactive molecules for organic redox flow batteries. These redox indicators are novel electroactive materials that can perform multielectron transfers in aqueous media. We performed the synthesis, electrochemical characterization, and theoretical study of the dimer of sodium 4-diphenylamine sulfonate, a benzidine derivative with high water solubility properties. The Pourbaix diagram of the dimer shows a bielectronic process at highly acidic pH values (≤ 0.9) and two single-electron transfers in a pH range from 0 to 9. The dimer was prepared in situ and tested on a neutral electrochemical flow cell as a stability diagnostic. To improve cell performance, we calculate and calibrate, with experimental data, the Pourbaix diagrams of benzidine derivatives using different substitution patterns and functional groups. A screening process allowed the selection of those derivatives with a bielectronic process in the entire pH window or at acidic/neutral pH values. Given the redox potential difference, they can be potential catholytes or anolytes in a flow cell. The couples formed with the final candidates can generate a theoretical cell voltage of 0.60 V at pH 0 and up to 0.68 V at pH 7. These candidate molecules could be viable as electroactive materials for a full-organic redox flow battery.
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spelling pubmed-105006722023-09-15 Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries Flores-Leonar, Martha M. Acosta-Tejada, Gloria Laguna, Humberto G. Amador-Bedolla, Carlos Sánchez-Castellanos, Mariano Ugalde-Saldívar, Víctor M. ACS Omega [Image: see text] This paper presents a theoretical and experimental evaluation of benzidine derivatives as electroactive molecules for organic redox flow batteries. These redox indicators are novel electroactive materials that can perform multielectron transfers in aqueous media. We performed the synthesis, electrochemical characterization, and theoretical study of the dimer of sodium 4-diphenylamine sulfonate, a benzidine derivative with high water solubility properties. The Pourbaix diagram of the dimer shows a bielectronic process at highly acidic pH values (≤ 0.9) and two single-electron transfers in a pH range from 0 to 9. The dimer was prepared in situ and tested on a neutral electrochemical flow cell as a stability diagnostic. To improve cell performance, we calculate and calibrate, with experimental data, the Pourbaix diagrams of benzidine derivatives using different substitution patterns and functional groups. A screening process allowed the selection of those derivatives with a bielectronic process in the entire pH window or at acidic/neutral pH values. Given the redox potential difference, they can be potential catholytes or anolytes in a flow cell. The couples formed with the final candidates can generate a theoretical cell voltage of 0.60 V at pH 0 and up to 0.68 V at pH 7. These candidate molecules could be viable as electroactive materials for a full-organic redox flow battery. American Chemical Society 2023-08-31 /pmc/articles/PMC10500672/ /pubmed/37720753 http://dx.doi.org/10.1021/acsomega.3c02297 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Flores-Leonar, Martha M.
Acosta-Tejada, Gloria
Laguna, Humberto G.
Amador-Bedolla, Carlos
Sánchez-Castellanos, Mariano
Ugalde-Saldívar, Víctor M.
Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title_full Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title_fullStr Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title_full_unstemmed Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title_short Benzidine Derivatives as Electroactive Materials for Aqueous Organic Redox Flow Batteries
title_sort benzidine derivatives as electroactive materials for aqueous organic redox flow batteries
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10500672/
https://www.ncbi.nlm.nih.gov/pubmed/37720753
http://dx.doi.org/10.1021/acsomega.3c02297
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