Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991, Moscow, Russia.
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991, Moscow, Russia.
Talanta. 2021 May 1;226:122151. doi: 10.1016/j.talanta.2021.122151. Epub 2021 Feb 2.
Effect of amines on formation of gold nanoparticles (AuNPs)/polymer nanocomposites has been observed and studied. Nanocomposites based on polyurethane foam and AuNPs were synthesized by interaction between the polymer modified with sodium borohydride and aqueous solution of tetrachloroauric acid. It has been shown that some amines cause a remarkable decrease of the surface plasmon resonance band of AuNPs in the nanocomposite material. Both aliphatic and aromatic amines as well as amines containing several amino groups were studied. A possible mechanism of the effect is discussed. It is probably based on stabilization of AuNPs with an amine that entails a decrease in the degree of their adsorption on PUF and appearance of the stabilized AuNPs in solution. The decrease of the nanocomposite surface plasmon resonance band is proportional to the concentration of amine in the solution. Based on this effect, a method for the determination of cetylamine, β-naphthylamine and neomycin in water and medical formulations using a monitor calibrator as a portable household tool is proposed. Under the selected conditions, the detection limits for amines were in the range of 0.7-1.5 μM, the determination ranges were approximately an order of magnitude. The observed color change of the nanocomposite samples also provides a good basis for semiquantitative determinations.
胺对金纳米粒子（AuNPs）/聚合物纳米复合材料的形成的影响已经被观察和研究。通过与硼氢化钠改性的聚合物与四氯金酸水溶液之间的相互作用，合成了基于聚氨酯泡沫和 AuNPs 的纳米复合材料。结果表明，一些胺会导致纳米复合材料中 AuNPs 的表面等离子体共振带显著降低。研究了脂肪族和芳香族胺以及含有多个氨基的胺。讨论了这种影响的可能机制。它可能基于与胺的 AuNPs 的稳定化，这导致 AuNPs 在 PUF 上的吸附程度降低，并且稳定的 AuNPs 出现在溶液中。纳米复合材料表面等离子体共振带的减少与溶液中胺的浓度成正比。基于该效应，提出了一种使用监视器校准器作为便携式家用工具在水和药物制剂中测定十六胺、β-萘胺和新霉素的方法。在所选择的条件下，胺的检测限在 0.7-1.5 μM 范围内，测定范围约为一个数量级。纳米复合材料样品的观察到的颜色变化也为半定量测定提供了良好的基础。
