{"title":"螯合环尺寸和咬角对铜(II)配合物电催化水氧化活性的影响","authors":"Pranjal Das , Swati Basak , Angarag Kashyap , Kripangkar Choudhury , Diganta Choudhury , Apurba Kalita","doi":"10.1016/j.poly.2025.117673","DOIUrl":null,"url":null,"abstract":"<div><div>The electrocatalytic water oxidation activity of two mononuclear copper (II) complexes, <strong>1</strong>, [Cu(L<sub>1</sub>)<sub>2</sub>]<sup>2+</sup>, and <strong>2</strong>, [Cu(L<sub>2</sub>)<sub>2</sub>]<sup>2+</sup>, with bidentate pyridyl-amine chelating ligands <strong>L</strong><sub><strong>1</strong></sub>, [L<sub>1</sub> = (pyridin-2-yl)methanamine] and <strong>L</strong><sub><strong>2</strong></sub>, [L<sub>2</sub> = 2-(pyridin-2-yl)ethan-1-amine], has been investigated. Ligands <strong>L</strong><sub><strong>1</strong></sub> and <strong>L</strong><sub><strong>2</strong></sub> form five- and six-membered chelate rings around the copper (II) center with 81.35° and 86.55° bite angle, respectively. Complexes <strong>1</strong> and <strong>2</strong> exhibit turnover frequencies (TOF) of 5.81 s<sup>−1</sup> and 70.39 s<sup>−1</sup> at approximately 503 mV and 413 mV overpotential, respectively, in neutral phosphate buffer. Electrochemical analysis revealed that the chelate ring size and ligands bite angle has significant influence on the overall catalytic activity of these complexes.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"280 ","pages":"Article 117673"},"PeriodicalIF":2.4000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of chelating ring size and bite angle on the electrocatalytic water oxidation activity of copper (II) complexes\",\"authors\":\"Pranjal Das , Swati Basak , Angarag Kashyap , Kripangkar Choudhury , Diganta Choudhury , Apurba Kalita\",\"doi\":\"10.1016/j.poly.2025.117673\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The electrocatalytic water oxidation activity of two mononuclear copper (II) complexes, <strong>1</strong>, [Cu(L<sub>1</sub>)<sub>2</sub>]<sup>2+</sup>, and <strong>2</strong>, [Cu(L<sub>2</sub>)<sub>2</sub>]<sup>2+</sup>, with bidentate pyridyl-amine chelating ligands <strong>L</strong><sub><strong>1</strong></sub>, [L<sub>1</sub> = (pyridin-2-yl)methanamine] and <strong>L</strong><sub><strong>2</strong></sub>, [L<sub>2</sub> = 2-(pyridin-2-yl)ethan-1-amine], has been investigated. Ligands <strong>L</strong><sub><strong>1</strong></sub> and <strong>L</strong><sub><strong>2</strong></sub> form five- and six-membered chelate rings around the copper (II) center with 81.35° and 86.55° bite angle, respectively. Complexes <strong>1</strong> and <strong>2</strong> exhibit turnover frequencies (TOF) of 5.81 s<sup>−1</sup> and 70.39 s<sup>−1</sup> at approximately 503 mV and 413 mV overpotential, respectively, in neutral phosphate buffer. Electrochemical analysis revealed that the chelate ring size and ligands bite angle has significant influence on the overall catalytic activity of these complexes.</div></div>\",\"PeriodicalId\":20278,\"journal\":{\"name\":\"Polyhedron\",\"volume\":\"280 \",\"pages\":\"Article 117673\"},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polyhedron\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0277538725002876\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polyhedron","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0277538725002876","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Effect of chelating ring size and bite angle on the electrocatalytic water oxidation activity of copper (II) complexes
The electrocatalytic water oxidation activity of two mononuclear copper (II) complexes, 1, [Cu(L1)2]2+, and 2, [Cu(L2)2]2+, with bidentate pyridyl-amine chelating ligands L1, [L1 = (pyridin-2-yl)methanamine] and L2, [L2 = 2-(pyridin-2-yl)ethan-1-amine], has been investigated. Ligands L1 and L2 form five- and six-membered chelate rings around the copper (II) center with 81.35° and 86.55° bite angle, respectively. Complexes 1 and 2 exhibit turnover frequencies (TOF) of 5.81 s−1 and 70.39 s−1 at approximately 503 mV and 413 mV overpotential, respectively, in neutral phosphate buffer. Electrochemical analysis revealed that the chelate ring size and ligands bite angle has significant influence on the overall catalytic activity of these complexes.
期刊介绍:
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