Ferric molybdate (Fe₂(MoO₄)₃) nanorods (NRs) were successfully synthesized using metal nitrates, citric acid and ethyl cellulose by a simple sol-gel method. Structural, morphological, optical and magnetic properties of the obtained powder were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, high resolution scanning electron microscope (HR-SEM), energy dispersive X-ray (EDX), UV-Visible diffuse reflectance spectra (DRS), photoluminescence (PL) spectra and vibrating sample magnetometer (VSM). XRD results indicated that the resultant powder was pure single phase crystalline with monoclinic structure. FT-IR spectra indicate the type of bonds between metals and oxygen. HR-SEM images shows that the morphology of the powder consist with well defined nanorods (NRs) structure. VSM results showed ferromagnetic behavior. The addition of TiO₂ catalyst, it enhanced the photo-catalytic activity of Fe₂(MoO₄)₃. The mixed oxide catalyst of Fe₂(MoO₄)₃-TiO₂ nano-composites (NCs) were also tested for the photocatalytic degradation (PCD) of 4-chlorophenol (4-CP). It was found that the PCD efficiency of Fe₂(MoO₄)₃ NCs is higher than pure Fe₂(MoO₄)₃ and TiO₂ catalysts.
Here, we describe the design, synthesis, and biological evaluation of oxazolidine derivatives. Oxazolidine ring is a reduced form of oxazole system; many of its derivatives possess interesting biological activities, such as anti-convulsant, anti-microbial, analgesic, anti-inflammatory and anti-tumor. In our study, the biological activity of synthesized novel 3-benzyl-2-(4'-substituted phenyl)-4(5H)-(4''-nitrophenyl amino)-1, 3-oxazolidines 6a-e were characterized by antimicrobial screening against several gram-positive, gram negative bacteria and fungus. The purity of the synthesized compounds was characterized by means of IR, 1H-NMR, mass spectral and elemental analysis. Antimicrobial screening for all the compounds exhibits characteristic microbial inhibition against Bacillus lentus, Micrococcus luteus, Bacillus cereus, Staphylococcus albus, Escherichia coli, Klebsiella aerogenes, Salmonella paratyphi, Proteus vulgaris and Candida albicans
Zinc oxide nanoparticles (ZnO NPs) were formed through a simple green synthesis route using Vitex negundo (V. negundo) leaf extract as reducing and capping source. Morphological, structural, chemical and optical features of prepared ZnO NPs were examined by field emission SEM, XRD, EDAX, PL, FTIR and UV-vis DRS, respectively. FESEM images precisely visualized morphology of the ZnO NPs as spherical with particles size ranges between 5 and 35 nm having a mean diameter of ∼19 nm. XRD pattern revealed formation of hexagonal wurtzite structured ZnO NPs with high crystallinity. Asymmetric stretching vibration of Zn-O bond through FTIR analysis confirmed formation of hexagonal wurtzite structured ZnO NPs. Catalytic activity of the ZnO NPs was assessed against methylene blue (MB) dye degradation under natural sunlight illumination. Results of the photocatalytic experiment disclosed an impressive MB dye degradation efficiency of 98.50% at 60 min. Moreover, green synthesized ZnO NPs exhibited a maximum mineralization (TOC removal) efficiency of 92.34% at 5 h of sunlight illumination.
Reaction of isatin with acetophenone derivatives gave 3-hydroxy-3-phenacyl oxindole derivative (6), dehydration of (6) gave 3-phenacylidene-2-indolinone derivative (7). Reaction of (7) with sarcosine and acenaphthenequinone yield novel spirooxindole derivatives which are characterized by various spectral methods. The compounds were subjected to antibacterial and antifungal studies and the results are very promising.
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