Caterina Trotta, Gabriel Menendez Rodriguez*, Cristiano Zuccaccia and Alceo Macchioni*,
{"title":"吡啶脒铱络合物在 1,4- 和 1,6-NADH 相互转化过程中介导的电化学 NADH 再生技术","authors":"Caterina Trotta, Gabriel Menendez Rodriguez*, Cristiano Zuccaccia and Alceo Macchioni*, ","doi":"10.1021/acscatal.4c02548","DOIUrl":null,"url":null,"abstract":"<p >Although there is a huge interest in redox mediators for the selective electrochemical regeneration of 1,4-NADH, only the class of rhodium compounds with bipyridine ligands, initially introduced by the pioneering work of Wienkamp and Steckhan (<contrib-group><span>Wienkamp, R.</span>; <span>Steckhan, E.</span></contrib-group> <cite><i>Angew. Chem. Int. Ed. Engl.</i></cite> <span>1982</span>, <em>21</em>, 782−783, <pub-id>10.1002/anie.198207822</pub-id>), has been developed over the last few decades. Here we report the first two progenitors of a class of redox mediators for indirect NADH regeneration, namely [Cp*Ir(R′-pica)Cl] {pica = R′-picolinamidate = κ<sup>2</sup>-R′-pyridine-2-carboxamide ion (−1), <b>1</b> R′ = H and <b>2</b> R′ = Me}, which exhibit high TOF values (0.51 and 1.34 s<sup>–1</sup> for <b>1</b> and <b>2</b>, respectively), a production rate of up to 3 μmol h<sup>–1</sup> cm<sup>–2</sup>, and a faradaic efficiency of up to 99% for both complexes in 0.1 M phosphate buffer (pH 7, 298 K). The reaction exclusively leads to a mixture of 1,4-NADH, the desired product, and 1,6-NADH always in a 91:9 molar ratio, independently of the redox mediator, degree of conversion, and applied potential. <sup>1</sup>H EXSY NMR unequivocally shows that a rapid equilibrium establishes between 1,6-NADH and 1,4-NADH (<i>K</i><sub>eq</sub> = 10.1, Δ<i>G</i><sup>0</sup> = −1.4 kcal mol<sup>–1</sup>, 298 K), in the presence of <b>1</b> and <b>2</b>, suggesting that the latter are capable of rapidly interconverting the two regioisomers of NADH, thus allowing utilization of the totality of regenerated NADH.</p>","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":null,"pages":null},"PeriodicalIF":11.3000,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electrochemical NADH Regeneration Mediated by Pyridine Amidate Iridium Complexes Interconverting 1,4- and 1,6-NADH\",\"authors\":\"Caterina Trotta, Gabriel Menendez Rodriguez*, Cristiano Zuccaccia and Alceo Macchioni*, \",\"doi\":\"10.1021/acscatal.4c02548\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Although there is a huge interest in redox mediators for the selective electrochemical regeneration of 1,4-NADH, only the class of rhodium compounds with bipyridine ligands, initially introduced by the pioneering work of Wienkamp and Steckhan (<contrib-group><span>Wienkamp, R.</span>; <span>Steckhan, E.</span></contrib-group> <cite><i>Angew. Chem. Int. Ed. Engl.</i></cite> <span>1982</span>, <em>21</em>, 782−783, <pub-id>10.1002/anie.198207822</pub-id>), has been developed over the last few decades. Here we report the first two progenitors of a class of redox mediators for indirect NADH regeneration, namely [Cp*Ir(R′-pica)Cl] {pica = R′-picolinamidate = κ<sup>2</sup>-R′-pyridine-2-carboxamide ion (−1), <b>1</b> R′ = H and <b>2</b> R′ = Me}, which exhibit high TOF values (0.51 and 1.34 s<sup>–1</sup> for <b>1</b> and <b>2</b>, respectively), a production rate of up to 3 μmol h<sup>–1</sup> cm<sup>–2</sup>, and a faradaic efficiency of up to 99% for both complexes in 0.1 M phosphate buffer (pH 7, 298 K). The reaction exclusively leads to a mixture of 1,4-NADH, the desired product, and 1,6-NADH always in a 91:9 molar ratio, independently of the redox mediator, degree of conversion, and applied potential. <sup>1</sup>H EXSY NMR unequivocally shows that a rapid equilibrium establishes between 1,6-NADH and 1,4-NADH (<i>K</i><sub>eq</sub> = 10.1, Δ<i>G</i><sup>0</sup> = −1.4 kcal mol<sup>–1</sup>, 298 K), in the presence of <b>1</b> and <b>2</b>, suggesting that the latter are capable of rapidly interconverting the two regioisomers of NADH, thus allowing utilization of the totality of regenerated NADH.</p>\",\"PeriodicalId\":9,\"journal\":{\"name\":\"ACS Catalysis \",\"volume\":null,\"pages\":null},\"PeriodicalIF\":11.3000,\"publicationDate\":\"2024-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Catalysis \",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acscatal.4c02548\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Catalysis ","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acscatal.4c02548","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Electrochemical NADH Regeneration Mediated by Pyridine Amidate Iridium Complexes Interconverting 1,4- and 1,6-NADH
Although there is a huge interest in redox mediators for the selective electrochemical regeneration of 1,4-NADH, only the class of rhodium compounds with bipyridine ligands, initially introduced by the pioneering work of Wienkamp and Steckhan (Wienkamp, R.; Steckhan, E.Angew. Chem. Int. Ed. Engl.1982, 21, 782−783, 10.1002/anie.198207822), has been developed over the last few decades. Here we report the first two progenitors of a class of redox mediators for indirect NADH regeneration, namely [Cp*Ir(R′-pica)Cl] {pica = R′-picolinamidate = κ2-R′-pyridine-2-carboxamide ion (−1), 1 R′ = H and 2 R′ = Me}, which exhibit high TOF values (0.51 and 1.34 s–1 for 1 and 2, respectively), a production rate of up to 3 μmol h–1 cm–2, and a faradaic efficiency of up to 99% for both complexes in 0.1 M phosphate buffer (pH 7, 298 K). The reaction exclusively leads to a mixture of 1,4-NADH, the desired product, and 1,6-NADH always in a 91:9 molar ratio, independently of the redox mediator, degree of conversion, and applied potential. 1H EXSY NMR unequivocally shows that a rapid equilibrium establishes between 1,6-NADH and 1,4-NADH (Keq = 10.1, ΔG0 = −1.4 kcal mol–1, 298 K), in the presence of 1 and 2, suggesting that the latter are capable of rapidly interconverting the two regioisomers of NADH, thus allowing utilization of the totality of regenerated NADH.
期刊介绍:
ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels.
The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.