Plant-mediated green synthesis of Ag nanoparticles using Rauvolfia tetraphylla (L) flower extracts:Characterization, biological activities, and screening of the catalytic activity in formylation reaction

Various plant extracts have been currently used for the bioproduction of nanoparticles that find enormous applications. Rauvolfia tetraphylla flower extracts were employed to obtain silver nanoparticles (Ag NPs) by bioproduction. The biologically produced nanoparticles were characterized by XRD, FTIR, UV-Vis, BET, SEM, EDAX and TEM analysis. The phytochemical screening of the Rauvolfia tetraphylla flower extracts indicated presence of nine different constituents. The bioreduction of Ag NPs by phytochemicals was revealed by FTIR analysis. The elemental composition of Ag NPs was reported by EDAX spectral analysis. The Ag NPs exhibited anti-bacterial activity against Pseudomonas aeruginosa, Staphylococus aureus, Klebsiella aerogenes and Escherichia coli, anti-fungal activity against Penicillium citrinum and Aspergillus flavus and anti-mitotic activity. The response of amines through formic acid within the sight of an Ag NPs catalyst in dissolvable free condition provides high yielded convention for the N-formylation to shape the comparing formamide derivatives. N-fromylation includes incite recyclability, clean strategy and naturally neighbourly under milder response conditions and straightforward work-up to brilliant yield of the coveted items.