Online ISSN: 2788-6867

Main Subjects : Chemistry


Synthesis, Characterization and Corrosion Inhibition of Novel Pyridine on Mild Steel in Hydrochloric Acid Environment

Bassma A. Hadi; Hiba H. Ibraheem

Journal of Applied Sciences and Nanotechnology, 2022, Volume 2, Issue 2, Pages 55-63
DOI: 10.53293/jasn.2021.3862.1050

Corrosion inhibitions in corrosive solutions of hydrochloric acid for mild steel by chemical compound 3-acetyl-4-(4-bromophenyl)-6-2-oxo-2H-chromen-3-yl pyridine-2(1H)-one (ABCP), was conducted and the chemical structure was elucidated The Nuclear Magnetic Resonance (H-NMR) and Fourier Transform Infrared (FT-IR) spectroscopic techniques. The compound ABCP  had been investigated at 25 ˚C via weight loss technique. The outcomes show that the ABCP displays great performances as an inhibitor for mild steel in 0.5 M hydrochloric acid. Inhibition efficiency increments with expanding of concentration and become 98.4% at the highest studied concentration. The studies have demonstrated a reverse association between corrosion rate (CR) and inhibition efficiency (IE percent), as IE increases while CR decreases with an increased concentration. In the presence of ABCP, inhibitory efficiency was up to 98.4% at 25°C in presence of ABCP (0.5 mM). IE drops notably at 65°C with an increased temperature. By means of FT -IR and NMR spectroscopy approaches and physical properties through melting point and Thin Layer Chromatography  (TLC), the chemical structure of the tested inhibitor has been clarified.

Synthesis, Bio-evaluation and Quantum Chemical Studies of Some Coumarin Derivatives

Yasameen Kadhim Hasan Al-Majedy; Samar M. Shakir

Journal of Applied Sciences and Nanotechnology, 2022, Volume 2, Issue 1, Pages 20-27
DOI: 10.53293/jasn.2021.4164.1076

Coumarins are oxygen heterocyclic compounds that exist naturally and have a wide range of pharmacological properties, making them ideal as lead compounds for developing more powerful analogs. The modification of 4-methyl, 7-hydroxycoumarin by different reaction steps was done in this study to yield target compounds. They were characterized by different spectroscopic techniques (FT-IR and NMR), melting point and a thin layer chromatography. The microbiological activity of these compounds was investigated in a variety of bacterial and fungal species. Since the newly synthesized derivatives contain a variety of functional groups and may be microbiologically active, so the microbiological function of these derivatives in a variety of bacteria and fungi species was examined. In terms of the microorganism growth inhibition, the prepared compounds showed various levels of the activity. Antimicrobial properties have been discovered in newly synthesized derivatives. Density functional theory calculations of the synthesized coumarins were performed using molecular structures with optimized geometries.

Preparation of V2O5 and SnO2 Nanoparticles and Their Application as Pollutant Removal

Zahra A. Hassan; Rashed T. Rasheed

Journal of Applied Sciences and Nanotechnology, 2021, Volume 1, Issue 4, Pages 69-80
DOI: 10.53293/jasn.2021.3869.1049

Vanadium pentoxide and Tin dioxide nanoparticles were prepared by hydrothermal methods to remove methylene blue (MB) and bromothymol blue (BTB) dyes). First the prepared nanoparticles were heated at different temperature (90 oC and 500 oC). Then these nanoparticles were characterized by different methods such as UV/Visible, FT-IR Spectroscopy, X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), and Scanning Electron Microscopy (SEM). Our results explain that vanadium pentoxide nanoparticles appeared high remove activity against both types of organic dyes (MB and BTB) compared to tin dioxide nanoparticles. Furthermore,vanadium pentoxide heating at 90 oC has grain size (86.02 nm) more than that of Tin dioxide (48.02 nm) at same temperature. The activity of vanadium pentoxide is more than that of tin dioxide.may be related to high ionic potential (0.073), compared with Tin dioxide (0.048).