二氧化物衍生的非海姆单核FeIII(OH) 复合物及其与碳基的反应性
Vishal Yadav1, Jesse B Gordon1, Maxime A Siegler1
1Department of Chemistry , The Johns Hopkins University , Baltimore , Maryland 21218 , United States.
Journal of the American Chemical Society
|June 28, 2019
概括
研究人员合成了一种新型联体来稳定反应性铁化合物. 这种铁复合物通过与碳基反应来模仿非血铁酶,从而提供了对其机制的见解.
科学领域:
- 生物有机化学
- 有机金属化学
- 协调化学
背景情况:
- 非血型铁酶在生物氧化反应中起着至关重要的作用.
- 由于反应性中间体的短暂性质,了解这些酶的机制具有挑战性.
- 稳定反应性铁物种是机械研究的关键.
研究的目的:
- 合成一种能够稳定终端铁氧化物复合物的新配体.
- 调查稳定复合物与分子氧和碳基的反应性.
- 模仿和阐明非血铁酶所提出的激素反弹机制.
主要方法:
- 合成一种新的四牙,单,混合N/O供体配体 (BNPAPh2O-) 具有结合能力.
- 使用X射线衍射,质谱,UV-vis,NMR (H,F),Mössbauer (Fe) 和EPR光谱的铁 (II) 和铁 (III) 复合物的表征.
- 与O2和碳基 (Ar3C) 发生反应的反应性研究.
主要成果:
- 使用设计的配体成功合成和稳定单核终端FeIII(OH) 复合物.
- 该FeII复合物与O2发生反应,形成FeIII(OH) 的物种.
- FeIII(OH) 复合物与碳基发生反应,产生酒精并再生FeII复合物,反映了基反弹过程.
结论:
- 这种新型联体有效地稳定了反应终端的铁氧化物.
- 观察到的反应性为非血铁酶催化过程中的基因反弹阶段提供了一个化学模型.
- 这项研究为生物相关的铁介导反应的机制提供了宝贵的见解.
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