Abstract

Four novel siloxane-functionalized oligo(azomethine)s (o-AzThs) containing thiophene and alkyl-thiophene units were successfully synthesized via a high-temperature polycondensation reaction between dichlorodiphenylsilane and four diphenol monomers incorporating imine linkages. The resulting o-AzThs were characterized by spectroscopic methods (NMR, FTIR) and elemental analysis. These oligomers, composed for 4-9 repeating units per chain exhibited excellent solubility in common aprotic polar solvents, moderate molecular weights (Mn= 2.94-4.70 kDa), and narrow polydispersity indices (PDI approximate to 1.1). The new o-AzThs displayed thermal stability up to 223-370 degrees C and glass transition temperatures ranging from 56 to 91 degrees C. Optoelectronic analysis showed a broad absorption-emission behavior with bandgaps values of 2.36-2.52 eV, along with low HOMO energy levels (-5.24 to-5.36 eV) suggesting their potential applications in optoelectronic field.