氧气激活和O-O结合形成反应由 Corroles
Mian Guo1, Yong-Min Lee1, Ranjana Gupta1
1Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.
Journal of the American Chemical Society
|October 24, 2017
概括
冠醇复合物激活二氧化物并形成O-O键. 这项研究证明了可逆的O-O键形成和裂变使用相同的复合物,推进生物仿真反应研究.
科学领域:
- 无机化学 无机化学
- 生物模拟化学 生物模拟化学
- 催化剂是一种催化剂.
背景情况:
- 氧的激活和O-O键的形成在酶和生物仿真反应中至关重要.
- 最近的研究重点是O-O键形成,这是O2激活的反向.
- 复合物越来越多地因其在氧化反应中的催化特性而受到研究.
研究的目的:
- 通过使用冠醇复合物来研究O2激活和O-O键形成.
- 为了阐明O2激活和O-O键形成的机制,由角质介导.
- 为了证明这些系统中O-O键形成和裂变的可逆性.
主要方法:
- 在基和H原子供体的存在下,Mn{\displaystyle Mn{\text{III}}) 角质与O2的反应.
- 拟议的Mn(V) -oxo和Mn(IV) -peroxo中间体的光谱表征.
- 研究基度对中间体形成的影响.
- 通过添加氧化物和质子,研究O-O键形成和裂变的可逆性.
主要成果:
- 在特定条件下 (基和H原子供体) 在Mn{V}-oxo和Mn{IV}-peroxo中间体的O2激活过程中由Mn{III} corroles形成.
- 基的存在和数量影响了Mn(V) -oxo和Mn(IV) -peroxo物种的形成,这表明它在促进O2结合方面发挥了作用.
- 在Mn{\displaystyle V} -oxo和Mn{\displaystyle IV} -peroxo物种之间的O-O键形成和裂变被证明是可逆的.
- 这项工作提供了第一个单个复合物的例子,它既介导了O2激活和O-O键形成.
结论:
- 冠醇复合物可以有效地调解O2激活和O-O键形成.
- 反应机制涉及到Mn(IV) - 超和Mn(IV) - 水的中间体的形成.
- 该基在降低氧化潜力和促进O2激活方面发挥着至关重要的作用.
- 可逆的O-O键形成和裂变证明了这些复合物的多功能性在氧化还原化学.
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