Department of Chemistry, Payame Noor University, Tehran, Iran.
Department of Chemistry, Gobardanga Hindu College, 24-Parganas (North), India.
Sci Rep. 2021 Jan 21;11(1):1983. doi: 10.1038/s41598-021-81320-6.
Plant derived biogenic synthesis of nanoparticles (NP) has been the recent trend in material science as featured sustainable catalysts. A great deal of the current nanocatalytic research has been oriented on the bio-inspired green catalysts based on their wide applicability. In this context, CuO NPs are synthesized following a green approach using an herbal tea (Stachys Lavandulifolia) flower extract. The phytochemicals contained in it were used asthe internal reductant without applying harsh chemicals or strong heat. The derived nanoparticles also got stabilized by the biomolecular capping. The as-synthesized CuO NPs was characterized over FT-IR, FE-SEM, EDS, TEM, XRD, TGA and UV-Vis spectroscopy. These NPs were exploited as a competent catalyst in the aryl and heteroaryl C-heteroatom (N, O, S) cross coupling reactions affording outstanding yields. The nanocatalyst was isolated and recycled in 8 consecutive runs with reproducible catalytic activity. Rigidity of the CuO/S. Lavandulifolia nanocomposite was further justified by leaching test and heterogeneity test.
植物来源的生物合成纳米粒子 (NP) 是材料科学的最新趋势，因其具有可持续性而成为特色催化剂。目前的许多纳米催化研究都集中在基于仿生的绿色催化剂上，因为它们具有广泛的适用性。在这种情况下，CuO NPs 是通过使用草药茶（薰衣草）花提取物的绿色方法合成的。其中所含的植物化学物质被用作内部还原剂，而无需使用苛刻的化学物质或强烈的热量。衍生的纳米粒子也通过生物分子封端得到稳定。所合成的 CuO NPs 通过傅里叶变换红外光谱 (FT-IR)、场发射扫描电子显微镜 (FE-SEM)、能谱 (EDS)、透射电子显微镜 (TEM)、X 射线衍射 (XRD)、热重分析 (TGA) 和紫外可见光谱 (UV-Vis) 进行了表征。这些 NPs 被用作芳基和杂芳基 C-杂原子 (N、O、S) 交叉偶联反应的有效催化剂，产率出色。纳米催化剂在 8 次连续运行中被分离和回收，具有可重复的催化活性。通过浸出试验和非均相试验进一步证明了 CuO/S. Lavandulifolia 纳米复合材料的刚性。
