Synthesis and electrochemical polymerization of ter-arenes based on N-ethyl carbazole and thiophene

3,6-Bis(2-thiophenyl)-9-Ethyl carbazole (BTECZ) has been synthesized with t he aim of obtaining extensively conjugated, low oxidation potential monomer s relative to becoming analogous. The products were characterized via commo n techniques such as H-1-NMR, MS UV-visible, and electrochemical measuremen ts. The cyclic voltammogram of BTECZ reveals an irreversible behavior, sugg esting that a chemical reaction after the electron transfer is so fast that polymerization occurs. Oxidation of BTECZ takes place at about 0.849 V Fc/ Fc(+), which is much lower than thiophene or ethylcarbazole monomers, and t hus, there is a decrease in the oxidation potential side reactions. Electro chemical polymerization may occur via the unsubstituted 2-position of the t hiophene ring, revealing only one wave.