Kinetic studies of the oxidation of transition metal(II) malate complexes by peroxomonosulphate
作者:Mani Murugavelu、Murugian Shanmugam Ramachandran
DOI:10.1007/s11243-012-9682-4
日期:2013.3
is an appreciable induction period in the Cu(II) malate oxidation, while Co(II) malate oxidation follows a simple curve. The initial oxidation product for all three systems was identified as malonic semialdehyde. Alcohol quenching studies suggest that, even in the Co(II) malate-PMS system, no radical intermediates such as $$ \textSO}}_4}^ - .} $$ or $$ \textOH}}}^.} $$ are detected. The malonic
在 Cu(II) (2.50 × 10−4–5.00 × 10−3 M)、Co(II) (2.00 × 10−6–1.00 × 10−) 存在下过氧单硫酸盐 (PMS) 氧化苹果酸的动力学5 M) 和 Ni(II) (5.00 × 10−4–6.00 × 10−3 M) 在 pH 值范围 4.05–5.89 下进行了研究。Ni(II) 苹果酸的氧化遵循 [PMS] 和 [Ni(II)] 的简单一级动力学,而 Cu(II) 苹果酸和 Co(II) 苹果酸的氧化显示自催化。Cu(II) 苹果酸氧化有一个明显的诱导期,而 Co(II) 苹果酸氧化遵循简单的曲线。所有三个系统的初始氧化产物都被鉴定为丙二酸半醛。酒精淬灭研究表明,即使在 Co(II) 苹果酸-PMS 系统中,也没有自由基中间体,如 $$ \textSO}}_4}^ - .} $$ 或 $$ \text OH}}}^.}