| 초록 |
New donor-acceptor (D-A) type conjugated polymers were synthesized via Stille coupling reaction of dibrominated quinoxaline containing branched and linear alkyl side-chains with bis(trialkylstannyl)thiophene. The prepared D-A type polymers showed good solution processability, superior switching characteristics, and high redox stability. In electrochromic measurements, the polymers exhibited reversible blue-to-transmissive transitions at lower applied potentials of below 1.2 V. Furthermore, it was found out that the alkyl side-chains on the quinoxaline acceptor unit could dictate the intermolecular interactions of polymer chains affecting the electrochromic performances. The detailed electrochemical properties of prepared polymers were investigated by UV-Vis spectroscopy, photoluminescence, cyclic voltammetry, spectroelectrochemistry and microscope measurements. |
