Biosynthesis of Fe₃O₄‐magnetic nanoparticles using clover leaf aqueous extract: Green synthesis of 1,3‐benzoxazole derivatives

Abstract

In this research, magnetic Fe 3 O 4 -NP nanoparticles were synthesized employing a green biosynthetic procedure by reduction of ferric chloride solution with clover leaf water extract. The nanoparticles prepared via this biosynthesis method can potentially be valuable for different purposes such as organic synthesis. In this research, 1,3-benzoxazole derivatives were generated via a multicomponent reaction of α-bromo ketones, isothiocyanate, and propiolate in the presence of a catalytic amount of bio-Fe 3 O 4 MNPs and sodium hydride in water at 50 C in good yields. The catalyst was reused five times with a minor decrease in its catalytic activity. K E Y W O R D S 1,3-benzoxazole, alkyl (aryl) isothiocyanates, clover leaf, Fe 3 O 4 MNPs, isothiocyanates

New insight on some selected nanoparticles as an effective adsorbent toward diminishing the health risk of deltamethrin contaminated water

“…The creation of hydrogen bonds between H bond donor oxygen atoms and LDH layers is verified by the conjugation of deltamethrin with Zn-Al-GA LDH, as shown by the rise in intensity and shifting of peaks in the FT-IR spectra of Zn-Al-GA LDH/deltamethrin [ 35 , 53 ]. The appearance of some peak vibration modes at 1643 and 1734 cm -1 decreases the intensity of vibration peaks at 457 and 540 cm -1 in the FT-IR spectrum of deltamethrin/Fe-oxide, indicating the interaction of deltamethrin with Fe-oxide and the conversation of magnetite to hematite Fe-oxide, as well as the disappearance of a peak at 686 cm -1 [ 54 , 55 ].…”

“…vibration modes at 1643 and 1734 cm -1 decreases the intensity of vibration peaks at 457 and 540 cm -1 in the FT-IR spectrum of deltamethrin/Fe-oxide, indicating the interaction of deltamethrin with Fe-oxide and the conversation of magnetite to hematite Fe-oxide, as well as the disappearance of a peak at 686 cm -1 [54,55]. Table 3.…”

Green synthesis of pyrido[2,1‐a]isoquinolines and pyrido[1,2‐a]quinolins using Fe3O4‐MNPs as efficient nanocatalyst: Study of antioxidant activity

“…All chemicals were prepared from Fluka or Merck and employed with any further purification. We prepared Fe 3 O 4 MNPs through literature method . The morphology of nanoparticles of Fe 3 O 4 MNPs was characterized by scanning electron microscopy (SEM) using a Holland Philips XL30 microscope.…”

Algae-mediated route to biogenic cuprous oxide nanoparticles and spindle-like CaCO3: a comparative study, facile synthesis, and biological properties

“…13,14 Cu 2 O crystals with different morphologies have been prepared by chemical reduction approaches in which Cu 2+ ions convert to Cu + with a reducing agent and several successful methods have been reported for the production of Cu 2 O. [15][16][17][18] Some papers have reported the green and convenient biosynthesis of different metal oxide nanoparticles such as Fe 3 O 4 , 19 CuO, 20 TiO 2 , 21 ZnO, 22 Cu 2 O/CuO 23 and Ag/Cu 2 O, 24 which were produced using natural products. However, up to now, there are relatively few reports on the bio-preparation and algaemediated selective biosynthesis of nanocrystalline Cu 2 O compared with some other metal-based nanoparticles.…”