氧原子转移到半三明治复合体:清洁的氧化产生一个分子产物
Christopher R Turlington1, Peter S White, Maurice Brookhart
1W. R. Kenan Laboratory, Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States.
Journal of the American Chemical Society
|February 28, 2014
概括
复合物在氧化过程中经历两次氧原子转移 (OAT) 事件,形成一种新型中间体和一种氧化物种. 这种氧化复合物可以将氧气转移到氨酸中,产生氨酸氧化物和一个Ir-PPh3 adduct.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
- 氧化反应 氧化反应
背景情况:
- 与双联体的复合物正在研究它们在水氧化催化中的潜力.
- 了解连接体氧化途径对于设计稳定高效的催化剂至关重要.
- 某些连接物的氧化易感性会导致催化剂分解.
研究的目的:
- 为了研究复合物的氧化机制,[Ir(Cp*) ((phpy) ((NCAr(F)) ]][B(Ar(F)) 4].
- 为了识别在氧原子转移 (OAT) 反应过程中形成的中间体和产物.
- 为了建模基于的氧化水催化剂的潜在分解路径.
主要方法:
- 低温核磁共振 (NMR) 谱学用于监测氧化反应.
- 使用捕获联结体合成和表征中间物种.
- 氧化物种与酸的反应,以评估其反应性.
主要成果:
- 氧化过程通过两种不同的OAT事件进行,涉及直接攻击酸联体的碳.
- 一个关键的中间体,一个协调有机胺,被检测和特征.
- 形成了一个未知的"氧化复合物",它有效地将一个氧原子转移到trifenylphosphine.
结论:
- 该研究阐明了一种复杂的氧化途径,涉及复合体上连续发生的OAT事件.
- 这些发现提供了对水氧化催化剂潜在降解机制的见解.
- 氧化物种表现出可转移氧原子的能力,形成一个特征性的Ir-PPh3 adduct.
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