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首页> 外文期刊>RSC Advances >Green synthesis of Au nanoparticles using an aqueous extract of Stachys lavandulifolia and their catalytic performance for alkyne/aldehyde/amine A3 coupling reactions
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Green synthesis of Au nanoparticles using an aqueous extract of Stachys lavandulifolia and their catalytic performance for alkyne/aldehyde/amine A3 coupling reactions

机译：水苏树水提物绿色合成金纳米颗粒及其对炔烃/醛/胺A3偶联反应的催化性能

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High reaction rate and easy availability make green synthesis of metal nanoparticles noticeable. In the present study, gold nanoparticles with wide applications in different fields were synthesized by an ecofriendly method at room temperature using Stachys lavandulifolia extract as the reducing agent. Properties of the synthesized gold nanoparticles (GNP) were identified by different analytical techniques including: UV-Vis absorption spectroscopy verified presence of Au NPs in the solution while functional groups of its extract and synthesized Au NPs were determined by FT-IR. Its crystalline analysis with a fcc plane was verified by X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) determined elements in the sample. Surface morphology, diverse shapes and sizes of the Au NPs were shown by scanning electron microscopy (SEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). Beginning and end destruction temperatures of the Au/ S. lavandulifolia NPs were determined by thermal gravimetric analysis (TGA). The Au nanoparticles were capped with extracts, preventing them from oxidation and agglomeration and were used as an efficient heterogeneous nanocatalyst for a three-component reaction of amines, aldehydes, and alkynes (A ~(3) coupling). A diverse range of propargylamines were obtained in good yields. Furthermore, the separation and recycling of Au/ S. lavandulifolia NPs was very simple, effective, and economical.
机译：高反应速率和易获得性使金属纳米颗粒的绿色合成引人注目。在本研究中，采用淡紫色水苏木提取物作为还原剂，在室温下通过生态友好的方法合成了在不同领域具有广泛应用的金纳米粒子。合成金纳米颗粒（GNP）的特性通过不同的分析技术进行了鉴定，包括：UV-Vis吸收光谱法验证了溶液中Au NP的存在，而其提取物和合成Au NPs的官能团则通过FT-IR确定。通过X射线衍射（XRD）和能量色散光谱（EDS）测定样品中的元素验证了其在fcc平面上的晶体分析。通过扫描电子显微镜（SEM），原子力显微镜（AFM）和透射电子显微镜（TEM）显示出金纳米颗粒的表面形态，各种形状和大小。通过热重分析（TGA）确定Au / S. lavandulifolia NP的起始和终止破坏温度。金纳米粒子被提取物覆盖，防止其氧化和结块，并被用作胺，醛和炔烃的三组分反应的有效多相纳米催化剂（A〜（3）偶联）。以高收率获得了各种炔丙基胺。此外，Au / S. lavandulifolia NPs的分离和回收非常简单，有效和经济。

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