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    Toward Purple-to-Green-to-Transmissive-to-Black Color Switching in Polymeric Electrochrome
    (Amer Chemical Soc, 2014) Karabiyik, Elif; Sefer, Emre; Koyuncu, Fatma Baycan; Tonga, Murat; Ozdemir, Eyup; Koyuncu, Sermet
    A novel 3,4-ethylenedioxythiophene (EDOT)-based donoracceptor electroactive monomer (HCQE) bearing carbazole subunit is synthesized, and then the corresponding polymer, poly(HCQE), is directly deposited onto ITO/glass surface via electrochemical process. Spectroelectrochemical studies demonstrate that poly(HCQE) is capable of showing both n- and p-doping processes. Hence, this low band polymer serves the multielectrochromic feature at three separate states (-0.4 to -2.0 V, -0.4 to 1.2 V, and 1.2 to 2.0 V) with a highly unique near colorless and colored states, fast switching times, redox switching stability, and exceptional transmittance change. To the best of our knowledge, this is the first report of a neutral state green multielectrochromic polymer exhibiting successive switching of colored-to-bleached-to-colored in three distinct regimes.