المستخلص
In this study, two nano oxides; copper oxide (CuO) and silver oxide (Ag2O) were synthesized via the Sol-gel method using ethylene glycol as homogenous agent, while gold nanoparticles (Au NPs) were prepared by reduction method using sodium citrate as reducing agent. On the other hand, two Schiff base ligands contain reaction of thiazole and benzothiazole with chromone to produce (E)-2-ethoxy-3-((thiazol-2-ylimino)methyl)-4H-chromen-4-oland(E)-3-(benzo[d]thiazol-2-ylimino)methyl)-2-ethoxy-4H-chromen-4-ol and their copper, silver and gold complexes were prepared. Then, conductive polypyrrole (PPy) was also synthesized employing oxidative polymerization as utilizing ammonium persulfate (APS) as an initiators. The ligands and their complexes were characterized by Fourier-transform infrared spectroscopy (FTIR), Hydrogen Nuclear magnetic resonance (HNMR), Ultraviolet–visible spectroscopy (Uv-Vis), Magnetic Susceptibility and Conductivity meter, while the oxides and polymeric matrix were investigated by using X-ray diffraction (XRD), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC) and LCR meter.
The binary nanocomposite (PPy/CuO, PPy-Ag2O, PPy-Au, PPy-L1, PPy-L2, PPy-CuL1, PPy-CuL2, PPy-AgL1, PPy-AgL2, PPy-AuL1 and PPy-AuL2) were mixed with polyvinyl alcohol (PVA) to prepare polymeric matrix film for investigating the electric features at different frequencies via employing LCR meter. The results showed, at low frequencies, the constant of real and imaginary dielectric were reached to higher values in all prepared polymeric matrix, while it reduced with boosting the frequencies. In addition to, it appeared that the electric features of PPy/PVA matric are boosted and improved with increasing the CuL2 concentration.
