Coordination States of Fe3+ and Fe2+ Dissolved in Organic Solvents

Coordination States of Fe3+ and Fe2+ Dissolved in Organic Solvents
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DOI:
10.7566/jpsj.91.094605
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发表时间:
2022-09-15
影响因子:
1.7
通讯作者:
Moritomo, Yutaka
Moritomo, Yutaka
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Inoue, Dai;Komatsu, Toshiki;Moritomo, Yutaka

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用光谱法研究了Fe ~(2+)和Fe ~(3+)在几种有机溶剂中的配位状态。紫外-可见(UV-vis)光谱和扩展X射线吸收精细结构(EXAFS)分析表明,在所有溶液中,Fe 3+均形成[FeCl 4](-)配合物。EXAFS分析表明,Fe ~(2+)在N,N-二甲基甲酰胺(DMF)和N-甲基吡咯烷酮(NMP)溶液中形成[FeCl_4](2-),在乙二醇(EG)和甲醇(MeOH)溶液中形成[FeL_6](2+)(L为溶剂分子)。从L-Fe ~(2+)相互作用和Cl ~-在溶剂中的溶解度两个方面解释了Fe ~(2+)配位态的溶剂依赖性。
We spectroscopically investigated the coordination states of Fe2+ and Fe3+ dissolved in several organic solvents. Ultraviolet-visible (UV-vis) spectra and extended X-ray absorption fine structure (EXAFS) analyses revealed that Fe3+ forms [FeCl4](-) complex in all the solutions. The EXAFS analysis suggests that Fe2+ forms [FeCl4](2-) in N,N-dimethylformamide (DMF) and N-methylpyrrolidone (NMP) solutions while it forms [FeL6](2+) (L is solvent molecule) in ethylene glycol (EG) and methanol (MeOH) solutions. We interpreted the solvent dependence of the Fe2+ coordination state in terms of the L-Fe2+ interaction and Cl- solubility in solvent.