Synthesis and characterization of imine polymers containing group methyl silane aliphatic

A series of Schiff bases were synthesized by condensation reaction of 3-aminopropyl(diethoxy)methylsilane with 3-hydroxybenzaldehyde and 4-hydroxy benzaldehyde compounds. Polymers were synthesized from Schiff bases by oxidative polycondensation. Polymers were synthesized from 2-hydroxybenzaldehyde, 2-hydroxy-3-methoxybenzaldehyde and 2-hydroxy-1-naphthaldehyde by oxidative polycondensation. Then, poly(imine)s obtained by adding 3-aminopropyl(diethoxy)methylsilane to this polymers. Sodium hypochlorite (NaOCl) was used as oxidant. Solubility tests of the synthesized Schiff bases and polymers were performed in acetonitril, ethanol, methanol, n-hexane, etylacetat, aceton, THF, chloroform, DMF, DMSO. All compounds were characterized by FT-IR, UV-vis, 1H-NMR, 13C-NMR, CV and XPS analyses. In addition, thermal properties of Schiff bases and their polymers were determined by TGA, DTA and DSC techniques. DMA analyses of polymers were performed. Photoluminesans (PL) properties of the synthesized compunds were determined in solution forms in DMSO. Fluorescence measurements were carried out in various concentrated solutions to determine the optimum concentrations and obtain the maximal PL intensities. Conductivity properties of Schiff bases and polymers were examined. The number average molecular weight (Mn), weight average molecular weight (Mw) and polydispersity index (PDI) values of the synthesized compounds were determined by the size exclusion chromatography (SEC). SEM images of the synthesized polymers were obtained.