由{Fe(NO) 2}(10) 铁复合物dinitrosyl诱导的醇化
Nhut Giuc Tran1, Harris Kalyvas, Kelsey M Skodje
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States.
细胞二铁复合物 (DNIC) 可以作为化剂. 这项研究揭示了它们与二氧化碳的新型反应性,形成过氧酸盐物种和化.
科学领域:
- 生物有机化学 生物有机化学
- 协调化学 协调化学
- 氧化信号传输 氧化信号传输
背景情况:
- 细胞二铁复合物 (DNIC) 主要被称为氧化 (NO) 载体.
- 除了NO转移之外,DNIC的化学功能仍然在很大程度上未被探索.
- 之前的研究没有证明DNIC在NO运输之外的重要作用.
研究的目的:
- 为了研究与二氧化物结合的 N-bound {Fe(NO) 2} DNIC 的化学反应性.
- 探索DNIC在细胞环境中的潜在新生理或有害作用.
- 描述参与DNIC-二氧化物相互作用的反应产物和机制.
主要方法:
- 一个特定的N结合DNIC的合成和表征,[Fe(TMEDA) ((NO) 2].
- 在受控条件下,DNIC与分子氧 (O2) 的反应.
- 光谱分析,包括铁K边缘X射线吸收光谱,以确定反应中间体的结构.
- 形成的中间体在低温和照明下进行稳定性研究.
主要成果:
- 与N结合的DNIC,[Fe(TMEDA) ((NO) 2),表现出与O2.2的前所未有的反应性.
- 在 -80°C以下,形成一个稳定的铁氧酸盐中间体[Fe(TMEDA) ((NO) ((ONOO) ].
- 这种中间体起到化剂的作用,将2,4,-di-tert-butylphenol转化为2,4-di-tert-butyl-6-nitrophenol.
- X射线吸收光谱证实了五个协调的铁中心与一个双重的周期性过氧酸连接体.
结论:
- DNICs具有超出NO转移的化学功能,包括化.
- 铁氧酸盐中间体的形成表明DNICs在生物系统中的新角色.
- 这些发现凸显了DNICs作为细胞化剂的潜力,这对生理和病理过程都有影响.
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