氧与硫结合在化铁 - 硫酸盐复合物中的氧:与含Fe的化酸酶相关性
Chien-Ming Lee1, Chung-Hung Hsieh, Amitava Dutta
1Department of Chemistry, National Tsing Hua University, Hsinchu 30043, Taiwan.
Journal of the American Chemical Society
|September 18, 2003
概括
该研究详细介绍了一种新型铁-化单硫酸复合物的合成. 该复合物通过硫氧化形成,并与其前体进行光化学互转,突出显示铁二硫酸盐的反应性.
科学领域:
- 无机化学 无机化学
- 有机金属化学 有机金属化学
- 协调化学 协调化学
背景情况:
- 铁基复合物在各种化学过程中至关重要.
- 了解铁二酸盐的反应性是开发新催化系统的关键.
- 硫氧化反应为新型金属硫物种提供了途径.
研究的目的:
- 为了合成和表征一种新型的铁-化复合物与一种S-结合的单硫酸联体.
- 为了研究一氧化 (NO) 结合对铁二甲酸盐硫氧化的影响.
- 为了探索合成的铁硫酸盐物种的反应性和光化学性质.
主要方法:
- 通过硫氧化合成铁复合物[PPN][(NO)Fe(S,S-C6H4)2] (2) 和[PPN][(NO)Fe(S,SO2-C6H4)(S,S-C6H4)] (3) 的合成.
- 进行X射线晶体学以确定复合体3和4的结构.
- 光谱分析 (UV-vis,IR) 用于研究光化学相互转换.
- 使用分子氧和三酸 (PPh3) 的反应性研究.
主要成果:
- 隔离的铁-酸盐复合物3含有来自复合物2硫氧化中的S结合的单硫酸盐.
- 观察到NO结合促进了二氧化物的硫氧化,并稳定了硫酸盐物种.
- 为复合体3确定扭曲的三角形双金字塔几何,为复合体2确定扭曲的正方形金字塔几何.
- 合成了双核双硫酸盐) 复合物4并证明了复合物2和3之间的光化学相互转换.
- 确认复合物3是热稳定的,但光化学活跃的[O]释放.
结论:
- 与铁中心的结合促进了二氧化碳对铁二甲基酸盐的硫氧化.
- 由此产生的酸硫酸铁基物种具有稳定性,并表现出独特的结构和光化学性质.
- 复合体2和3在光化学上可以相互转换,复合体3在光解时释放氧气.
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