Abstract

The oxidation of N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) using ammonium peroxydisulfate and the high redox potential laccase from Trametes hirsuta is studied in order to clarify the significant differences in the chemical and enzymatic polymerization reactions of aniline. As opposed to the laccase-catalyzed reaction, the chemical oxidation of TMPD proceeds in two stages. The radical cation formed at the first stage is oxidized by the peroxydisulfate ion to quinoiddiimine that can interact with the initial TMPD. The kinetics of the formation of the radical cation \({\text{TMP}}{{{\text{D}}}^{{\centerdot + }}}\) is studied by ultraviolet–visible (UV–Vis) and electron paramagnetic resonance spectroscopy. The obtained data allow making an assumption about the difference in the mechanisms of chemical and enzymatic polymerization of aniline.

中文翻译：

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N，N，N'，N'-四甲基-对苯二胺的氧化研究以澄清苯胺生物催化和化学聚合机理的差异

抽象

的氧化Ñ，Ñ，Ñ “ Ñ ” -四甲基- p苯二胺（TMPD），使用过二硫酸铵，并从高氧化还原电势漆酶栓菌毛，以澄清在的化学和酶促聚合反应的显著差异进行了研究苯胺。与漆酶催化的反应相反，TMPD的化学氧化分为两个阶段。在第一阶段形成的自由基阳离子被过二硫酸根离子氧化为可与初始TMPD相互作用的醌二亚胺。自由基阳离子形成的动力学\（{\ text {TMP}} {{{\ text {D}}} ^ {{\ centerdot +}}} \）通过紫外可见光（UV-Vis）和电子顺磁共振波谱研究。所获得的数据允许对苯胺的化学和酶促聚合机理的差异做出假设。