电化学制备Sm(II) 反应剂,由弱协调的阳离子促进
Skyler D Ware1, Wendy Zhang1, David J Charboneau1
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, 91125, United States.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 13, 2023
概括
研究人员探索了三二氧化 (SmI2) 的电化学还原,以克服大规模合成的局限性. 他们发现counteranions显著影响samarium.
科学领域:
- 无机化学 无机化学 有机化学
- 电化学 电化学 电化学
- 有机合成 有机合成
背景情况:
- 二氧化 (SmI2) 是一种强大的单电子还原剂,对复杂分子中C-C键的形成至关重要.
- 目前的SmI2盐对大规模合成应用具有实际挑战,原因是其固有的缺点.
研究的目的:
- 调查影响Sm(III) 到Sm(II) 的电化学还原的因素.
- 开发电催化方法来减少萨马.
- 了解电解质和前体在Sm (II) / (III) 氧化还原行为的作用.
主要方法:
- 研究了Sm(III) 到Sm(II) 的电化学还原.
- 研究了支电解质,电极材料和Sm前体的影响.
- 分析了萨马物种的氧化还原潜力和降解能力.
主要成果:
- 在Sm盐中对抗离子的协调强度极大地影响Sm (II) / (III) 对的可逆性和氧化还原潜力.
- 鉴定出对抗性是Sm(III) 可还性的主要决定因素.
- 电化学生成的SmI2在模型反应中表现出与商业SmI2相当的性能.
结论:
- 电化学生成SmI2为传统方法提供了可行的替代方案.
- 了解对抗离子效应是优化基于萨马的电催化剂的关键.
- 这项研究为推进电催化反应提供了基本的见解.
相关概念视频
03:45Formation of Complex Ions
23.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.8K
02:33Preparation and Reactions of Thiols
6.4K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.4K
01:17Precipitation and Co-precipitation
1.9K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.9K
02:26Preparation and Reactions of Sulfides
5.0K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.0K
01:30Ladder Diagrams: Redox Equilibria
485
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
485
03:11Precipitation of Ions
28.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
28.0K