Synthesis and identification of organosoluble polyamides bearing a triaryl imidazole pendent: Thermal, photophysical, chemiluminescent, and electrochemical characterization with a modified carbon nanotube electrode

摘要

A novel monomer containing a triaryl imidazole pendent group was successfully synthesized by nucleo-philic substitution of bisphenol A with 2-(2-chloro-5-nitrophenyl)-4,5-diphenyl-1H-imidazole (I). A ser-rnies of new polyamides (PAs) with inherent viscosities of 0.95-1.2 dL/g was prepared by directrnpolycondensation of the diamine with various dicarboxylic acids. These PAs were readily soluble in many organic solvents and gave tough and flexible films by solution casting. These PAs exhibited T_gs betweenrn189 ℃ and 252℃, and 10% weight loss temperatures in excess of 400℃ with up to 68% char yield atrn600℃ in air. All of the PAs emitted a greenish-yellow light in dilute THF solution, with photolumines-cence (PL) quantum yields in the range of 10-25%. The chemiluminescent activity and electrochemical oxidation of the PAs were also investigated.