In order to learn the active components and their functional mechanism during the plant-mediated synthesis of gold nanoparticles (GNPs), 16 kinds of plants were randomly selected as research objects, and statistical analysis was used to obtain more universal and systematic results. Polyphenols are proved to have the most prominent effect in both reductive and protective capability among all components. The relationship between polyphenols concentration and the protective and reductive capability was further studied in detail. Pyrogallic acid was used as a substitute for polyphenols to elucidate the functional mechanism. The concentration of polyphenols was found to be a critical factor for the preparation of GNPs, and the synergistic competition between phenolic hydroxyl and carbonyl groups caused by the oxidation of polyphenols could affect the particle size and morphology of GNPs. This work can provide excellent guidance for the controllable synthesis of GNPs via the plant-mediated method.

中文翻译：

---

多酚在植物介导的金纳米粒子合成中的作用：活性成分的鉴定及其功能机制

为了解植物介导的纳米金（GNPs）合成过程中的活性成分及其作用机制，随机选取16种植物作为研究对象，通过统计分析得到更加普遍和系统的结果。事实证明，在所有成分中，多酚在还原和保护能力方面的作用最为突出。进一步详细研究了多酚浓度与保护和还原能力之间的关系。焦没食酸被用作多酚的替代品以阐明其功能机制。发现多酚的浓度是制备 GNP 的关键因素，多酚氧化引起的酚羟基和羰基之间的协同竞争会影响 GNPs 的粒径和形貌。这项工作可以为通过植物介导的方法可控合成 GNP 提供极好的指导。