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氧铵盐是氮氧自由基失去单电子后生成的高价化合物,其氧化性较氮氧自由基强。据报道,氧铵盐可氧化醇成醛或酮,相应氮氧自由基无此特性。Stier等指出,氮氧自由基可作为反应中间体存在于生物细胞的某些酶作用过程。Yamaguchi等发现,氮氧自由基可被H_2O_2/Fe~(2+)/氨基酸或H_2O_2/血红蛋白体系氧化为氧铵盐。鉴于Fe~(2+),·OH以及氨基酸存在于生物体内,因此研究氧铵盐与生物分子间的反应是有一定意义的。本文从反应产物,化学反应计量关系,电化学模拟和动力学测定诸方面对氧铰盐1与dl-半胱氨酸(2)于盐酸水溶液中的反应作了研究。
Oxygen ammonium salt is a high-priced compound generated after the loss of single electron by nitroxide radicals, which is more oxidative than nitroxide. It has been reported that oxy-ammonium salts oxidize alcohols to aldehydes or ketones, which are absent from the corresponding nitroxides. Stier et al. Pointed out that nitrogen and oxygen free radicals can act as reaction intermediates in some biological processes of biological cells. Yamaguchi et al found that nitrogen and oxygen free radicals can be H_2O_2 / Fe ~ (2 +) / amino acid or H_2O_2 / hemoglobin system is oxidized to ammonium oxy-salt. In view of Fe ~ (2 +), · OH and amino acids present in the body, so the study of the reaction between the oxygen ammonium salt and biological molecules is of some significance. In this paper, the reaction of Oxylamine 1 with dl-cysteine (2) in aqueous hydrochloric acid was studied in terms of the reaction products, the relationship of chemical reaction, electrochemical simulation and kinetic determination.