论文部分内容阅读
用分光光度法和循环伏安分析法研究了双羟基脲(DHU)与Fe(Ⅲ)的作用,结果表明,DHU与Fe3+能形成紫色配合物,配合物有二级或以上络合,形成的1∶1配合物分解速率对配合物来说为1级,在10℃下,c0(DHU)=c0(FeCl3)=1.0×10-3mol/L时,配合物表观一级分解速率常数k′=0.031 min-1。其配位方式可能是其分子中的N—O上的氧原子和另一个N—O上的氮原子与Fe3+配位。但形成的配合物不稳定,会发生配合物分子内氧化还原反应,电子从DHU分子转移到Fe(Ⅲ),Fe(Ⅲ)被还原为Fe(Ⅱ),而DHU被氧化。
The interaction between bis-hydroxyurea (DHU) and Fe (Ⅲ) was studied by spectrophotometry and cyclic voltammetry. The results showed that DHU and Fe3 + could form purple complexes with complexation of two or more complexes 1: 1, the decomposition rate of the complex was 1 level for the complex, and the apparent first-order decomposition rate constant k of the complex at 10 ℃ under c0 (DHU) = c0 (FeCl3) = 1.0 × 10-3mol / ’= 0.031 min-1. The coordination may be due to the coordination between the oxygen atom of N-O in its molecule and the nitrogen atom of another N-O with Fe3 +. However, the complex formed is not stable, and the intramolecular redox reaction occurs. The electron transfer from DHU to Fe (Ⅲ), Fe (Ⅲ) to Fe (Ⅱ) and DHU to oxidation.