Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO2

A series of new fac-[Mn(L)(CO)3Br] complexes where L is a bidentate chelating ligand containing mixed mesoionic triazolylidene-pyridine (MIC^py, 1), triazolylidene-triazole (MIC^trz, 2), and triazole-pyridine (trz^py, &l...

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Autores principales:	Sofia Friães, Sara Realista, Clara S. B. Gomes, Paulo N. Martinho, Beatriz Royo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	manganese mesoionic carbenes electrocatalytic CO<sub>2</sub> reduction Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/c76f197c789a412ba79e387da425ecbf
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spelling	oai:doaj.org-article:c76f197c789a412ba79e387da425ecbf2021-11-11T18:21:43ZClick-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>10.3390/molecules262163251420-3049https://doaj.org/article/c76f197c789a412ba79e387da425ecbf2021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6325https://doaj.org/toc/1420-3049A series of new <i>fac</i>-[Mn(L)(CO)<sub>3</sub>Br] complexes where L is a bidentate chelating ligand containing mixed mesoionic triazolylidene-pyridine (MIC^py, <b>1</b>), triazolylidene-triazole (MIC^trz, <b>2</b>), and triazole-pyridine (trz^py, <b>3</b>) ligands have been prepared and fully characterized, including the single crystal X-ray diffraction studies of <b>1</b> and <b>2</b>. The abilities of <b>1</b>–<b>3</b> and complex <i>fac</i>-[Mn(MIC^MIC)(CO)<sub>3</sub>Br] (<b>4</b>) to catalyze the electroreduction of CO<sub>2</sub> has been assessed for the first time. It was found that all complexes displayed a current increase under CO<sub>2</sub> atmosphere, being <b>3</b> and <b>4</b> the most active complexes. Complex <b>3</b>, bearing a N^N-based ligand exhibited a good efficiency and an excellent selectivity for reducing CO<sub>2</sub> to CO in the presence of 1.0 M of water, at low overpotential. Interestingly, complex <b>4</b> containing the strongly electron donating di-imidazolylidene ligand exhibited comparable activity to <b>3</b>, when the experiments were performed in neat acetonitrile at slightly higher overpotential (−1.86 vs. −2.14 V).Sofia FriãesSara RealistaClara S. B. GomesPaulo N. MartinhoBeatriz RoyoMDPI AGarticlemanganesemesoionic carbeneselectrocatalytic CO<sub>2</sub> reductionOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6325, p 6325 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	manganese mesoionic carbenes electrocatalytic CO<sub>2</sub> reduction Organic chemistry QD241-441
spellingShingle	manganese mesoionic carbenes electrocatalytic CO<sub>2</sub> reduction Organic chemistry QD241-441 Sofia Friães Sara Realista Clara S. B. Gomes Paulo N. Martinho Beatriz Royo Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
description	A series of new <i>fac</i>-[Mn(L)(CO)<sub>3</sub>Br] complexes where L is a bidentate chelating ligand containing mixed mesoionic triazolylidene-pyridine (MIC^py, <b>1</b>), triazolylidene-triazole (MIC^trz, <b>2</b>), and triazole-pyridine (trz^py, <b>3</b>) ligands have been prepared and fully characterized, including the single crystal X-ray diffraction studies of <b>1</b> and <b>2</b>. The abilities of <b>1</b>–<b>3</b> and complex <i>fac</i>-[Mn(MIC^MIC)(CO)<sub>3</sub>Br] (<b>4</b>) to catalyze the electroreduction of CO<sub>2</sub> has been assessed for the first time. It was found that all complexes displayed a current increase under CO<sub>2</sub> atmosphere, being <b>3</b> and <b>4</b> the most active complexes. Complex <b>3</b>, bearing a N^N-based ligand exhibited a good efficiency and an excellent selectivity for reducing CO<sub>2</sub> to CO in the presence of 1.0 M of water, at low overpotential. Interestingly, complex <b>4</b> containing the strongly electron donating di-imidazolylidene ligand exhibited comparable activity to <b>3</b>, when the experiments were performed in neat acetonitrile at slightly higher overpotential (−1.86 vs. −2.14 V).
format	article
author	Sofia Friães Sara Realista Clara S. B. Gomes Paulo N. Martinho Beatriz Royo
author_facet	Sofia Friães Sara Realista Clara S. B. Gomes Paulo N. Martinho Beatriz Royo
author_sort	Sofia Friães
title	Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
title_short	Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
title_full	Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
title_fullStr	Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
title_full_unstemmed	Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>
title_sort	click-derived triazoles and triazolylidenes of manganese for electrocatalytic reduction of co<sub>2</sub>
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c76f197c789a412ba79e387da425ecbf
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Click-Derived Triazoles and Triazolylidenes of Manganese for Electrocatalytic Reduction of CO<sub>2</sub>

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