Biosynthesis, characterization and antioxidant activity of oleuropein-mediated silver nanoparticles. Issue 3 (11th July 2020)

• Record Type: Journal Article
• Authors: Genc, Nusret; Yildiz, Ilyas; Chaoui, Radia; Erenler, Ramazan; Temiz, Cengiz; Elmastas, Mahfuz
• Is Part Of: Inorganic and nano-metal chemistry. Volume 51:Issue 3(2021)
• Page Start: 411
• Page End: 419
• Publication Date: 2020-07-11
• Subjects: Nanoparticles -- oleuropein -- antioxidant activity -- natural product; Inorganic compounds -- Synthesis -- Periodicals; Nanostructured materials -- Periodicals; Reactivity (Chemistry) -- Periodicals; Inorganic compounds -- Synthesis; Nanostructured materials; Reactivity (Chemistry); Periodicals; 546
• DOI: 10.1080/24701556.2020.1792495
• Languages: English
• ISSNs: 2470-1556

Abstract

Abstract: In this study, oleuropein was isolated from olive leaves by chromatographic method and its structure was elucidated by spectroscopic analyses such as FTIR, 1 H-NMR and 13 CNMR. Silver nanoparticles (AgNPs) were synthesized using oleuropein and their antioxidant activity was investigated using DPPH, ABTS +, and FRAP assays. The AgNPs were characterized by UV-Vis, FT-IR, XRD, and SEM analyses. The absorption peak at 450 nm in UV-Vis spectrum confirmed the AgNPs formation. Scanning electron microscope (SEM) identified the formation of spherical-shaped nanoparticles with the average size of 71 nm. Rietveld analysis was carried out by X-ray diffraction data with High Score Plus software. XRD with 2θ degrees at 38.1°, 44.3°, 64.4° and 77.4° can be assigned to the (111), (200), (220) and (311) Bragg's reflections of the face-centered cubic crystalline structure. Biosynthetic nanoparticles revealed more inhibitory effect (5.22, IC50, µg/mL) against ABTS + than standard BHT (7.03, IC50, µg/mL).