Synthesis and Characterization A Novel Thermally Stable Schiff Base Oligomer: Investigation of Conductivity Properties

This paper presents design of a novel Schiff base, 2,2'-{[1,2-di(pyridin-2-yl)ethane-1,2-diylidene]bis(azanylylidene)}diphenol (2,2-DBD), and its oligophenol, Oligo-(2,2'-{[1,2-di(pyridin-2-yl)ethane-1,2-diylidene]bis(azanylylidene)}diphenol) O(2,2-DBD), synthesized with NaOCl and O 2 oxidants in aqueous alkaline medium by oxidative polycondensation reaction . The effects of oxidant type, polymerization temperature and time on oligomer yield were determined. Characterization of the structures of the synthesized (2,2-DBD) and O(2,2-DBD) were done by UV-Vis, FTIR and 1 HNMR techniques. Also, thermal degradations of the monomer and oligomer were investigated TG-DTG analysis and it was determined that the oligomer thermally stable up to 1200 ˚C. Additionally, electrical conductivity of the oligomer was improved by doping with iodine at 20 ˚C and the conductivity of the oligomer reached to 9x10 -4 S/cm by increasing 10 7 at the end of the 48 h doping time fold according to its undoped form.