acacia concinna pods: a natural and new bioreductant for palladium nanoparticles and its application to suzuki–miyaura coupling

In this study, efficient, simple and greener approach is applied for the synthesis of palladium nanoparticles using aqueous extract of acacia concinna, i.e., soap pods. the extract is mainly composed of saponin terpenoid which contains hydroxyl groups in its structure. this performs a versatile role as surfactant, reducing and stabilizing agent for palladium nanoparticles. the average particle size is found about 20 nm by using 30% extract (v/v) of a. concinna (soap-pod tree). diverse techniques are used to characterize synthesized nanoparticles such as uv–visible, tem and xps analysis. the synthesized nanoparticles showed excellent activity in suzuki–miyaura coupling. the synthesized pd nps can be effectively reused for at least five times with excellent yield of product. results confirmed this protocol as eco-benign, environmental-friendly, nontoxic and alternative to conventional other chemical methods.