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

IF 2.4 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Pranjal Das , Swati Basak , Angarag Kashyap , Kripangkar Choudhury , Diganta Choudhury , Apurba Kalita
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引用次数: 0

摘要

研究了两种单核铜(II)配合物1,[Cu(L1)2]2+和2,[Cu(L2)2]2+与双齿吡啶胺螯合配体L1, [L1 =(吡啶-2-基)甲胺]和L2, [L2 = 2-(吡啶-2-基)乙二胺]的电催化水氧化活性。配体L1和L2在铜(II)中心形成五元和六元螯合环,咬角分别为81.35°和86.55°。在中性磷酸盐缓冲液中,配合物1和2在过电位约为503 mV和413 mV时的转换频率分别为5.81 s−1和70.39 s−1。电化学分析表明,螯合环的大小和配体的咬合角对这些配合物的整体催化活性有显著影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of chelating ring size and bite angle on the electrocatalytic water oxidation activity of copper (II) complexes

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.
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来源期刊
Polyhedron
Polyhedron 化学-晶体学
CiteScore
4.90
自引率
7.70%
发文量
515
审稿时长
2 months
期刊介绍: Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.
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