Abstract
The aim of this research is to the identification of the changes in anion- and solvent-dependent polaronic transitions and the ratio of acid to monomer during the polymerization of new poly(ortho-methoxyaniline)nanosilica-supported sulfuric acid emeraldine salt1/salt2(POMA-NSSSA-ES1/ES2) nanocomposites. The synthesis is done by doping poly(ortho-methoxyaniline)-emeraldine base(POMA-EB) in the presence of nanosilica-supported sulfuric acid(NSSSA) under solid-state conditions. The structure, size, and morphology of all samples were identified using spectroscopy methods. Effect of acid concentration(0.5, 1.5, and 2.0) and low- and high-valent sulfate anion(H2SO4/HSO4- Vs. HSO4-/SO42-) on polaronic transitions of poly(ortho-methoxyaniline) nanocomposites in different solvents(NMP, MCR, DMSO and MeOH) and conductivity were studied and changes in polaron mutations under changing conditions were analyzed. Changes in polaron mutations under changing conditions were analyzed. Increasing the acid concentration compared to the monomer increases the absorption number in the UV-Vis study along with the red shift and bathochromic effect in low acid concentration and hyperchromic effect in high acid concentration for polaronic transition. The anion effect proved that by increasing the negative charge of the anion (SO42-) due to the limiting potential of the polaron and bipolaron structures, it prevents the creation of delocalized polaron structure with no change in a decrease and limitation of the POMA-NSSSA-ES2 nanocomposite conductivity. Results showed that the average size of nanocomposite particle obtained by this method was a range of 40-50 nm the morphology of nanocomposites was spherical (nanospheres) and POMA-NSSSA nanocomposites are completely in a doped state and the emeraldine salt from of POMA. During this research, for the first time, the polaronic orbital energy level was determined.