The radiolysis of aqueous solutions ofβ-mercaptoethylamine,β-N,N′-dimethylaminoethylmercaptan, and the nickel complexes with general formula (RS)2Ni corresponding to them was investigated.
The nature of the dependence of the yield of the decomposition of the ligand [G(-RSH)] on the concentration of the aminothiol, both in deaerated solutions and in oxygen-containing solutions, is identical for both aminothiols in the free form.
Aminothiols contained in the nickel complex (RS)2Ni undergo radiation oxidation to disulfides to a far lesser degree than in the free form.
From the dependence of the radiolysis of aminothiols on the pH in the absence and in the presence of Ni2+ ions in the interval of pH 5–12, it follows that the protection of aminothiols by nickel ions from radiation oxidation occurs only in the case of formation of a complex.
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Grachev, S.A., Shchelkunova, L.I. & Burzina, T.S. Influence of complex formation on the radiolysis of aminothiols. Russ Chem Bull 24, 2085–2089 (1975). https://doi.org/10.1007/BF00929729
- Aqueous Solution