Stable solutions of gold nanoparticles with an average diameter of 13 nm and C Au = 5×10 –4 M were obtained by the reduction of HAuCl 4 with an equivalent amount of sodium sulfite at 80–100 °C in the presence of 2% PEG 6000 as a stabilizer: AuCl 4 – + 3/2 SO 3 2– + 3/2 H 2 O → Au 0 + 3/2 SO 4 2– + 3 H + + 4 Cl – . The resulting solutions of nanoparticles do not contain additional components capable of complexation, redox, and acid-based interactions. The effect of additives of thiourea, cysteine, thiomalate, and glutathione at various pH on the stability of such solutions to the aggregation has been studied. It was shown that the values of the protonation constants and charges of species of a thiol-containing component are not the only factors determining stability. Using thiomalate (HTM 2– ) as an example, it was shown also that at pH 7–8, the chemisorption is not followed by the release of H + ions into the solution.

中文翻译：

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亚硫酸盐法在不含额外干扰成分的水溶液中合成金纳米粒子：含硫醇酸添加剂的影响

在 80–100 °C 下，在 2% PEG 存在下，通过用等量亚硫酸钠还原 HAuCl 4 获得平均直径为 13 nm 且 C Au = 5×10 –4 M 的金纳米颗粒的稳定溶液6000 作为稳定剂：AuCl 4 – + 3/2 SO 3 2– + 3/2 H 2 O → Au 0 + 3/2 SO 4 2– + 3 H + + 4 Cl – 。由此产生的纳米粒子溶液不包含能够络合、氧化还原和酸基相互作用的其他成分。已经研究了硫脲、半胱氨酸、硫代苹果酸盐和谷胱甘肽添加剂在不同 pH 值下对这些溶液对聚集的稳定性的影响。结果表明，质子化常数和含硫醇组分物质的电荷值并不是决定稳定性的唯一因素。以硫代苹果酸 (HTM 2– ) 为例，还表明在 pH 7–8 时，