Three 4-(trifluoromethoxy)phenyl-based polydithienylpyrroles (PTTPP, P(TTPP-co-DTC), and P(TTPP-co-DTP)) were synthesized electrochemically and their electrochromic behaviors were characterized. The introduction of electron withdrawing trifluoromethoxy unit in the side chain of polydithienylpyrroles (PSNS) decreases the HOMO and LUMO energy levels of PSNS. PTTPP film displays three various colors (grayish-yellow at 0 V, grayish-blue at 1.0 V, and bluish-violet at 1.4 V) from reduced to oxidized states. The optical contrast of PTTPP, P(TTPP-co-DTC), and P(TTPP-co-DTP) electrodes are 24.5% at 1050 nm, 49.0% at 916 nm, and 53.8% at 1302 nm, respectively. The highest η of the PTTPP electrode is 379.64 cm2 C?1 at 1050 nm. Three ECDs based on PTTPP, P(TTPP-co-DTC), or P(TTPP-co-DTP) as anodic film and PProDOT-Et2 as cathodic film were fabricated. PTTPP/PProDOT-Et2 ECD showed high transmittance change (35.7% at 588 nm) and high η (890.96 cm2·C?1 at 588 nm). P(TTPP-co-DTC)/PProDOT-Et2 and P(TTPP-co-DTP)/PProDOT-Et2 ECDs showed high transmittance change, rapid response time, adequate open circuit memory, and good electrochemical redox stability. Based on these findings, this work provides novel insights for appropriate design of high transmittance change and high efficient multi-colored electrochromic polymers.
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机译：在电化学上合成三种4-（三氟甲氧基）苯基基聚二二苯吡咯（PTTPP，P-CO-DTC）和P（TTPP-CO-DTC）和P（TTPP-CO-DTP），其表征它们的电致变色行为。取出的电子取代三氟甲氧基单位在聚二二苯吡咯（PSNS）侧链（PSNS）中降低了PSNS的HOMO和LUMO能量水平。 PTTPP薄膜显示出三种各种颜色（灰黄色，灰蓝色，1.0V，Bluish-violet，1.4 v）从减少到氧化状态。 PTTPP，P（TTPP-CO-DTC）和P（TTPP-CO-DTP）电极的光学对比度为1050nm，49.0％，49.0％，分别为49.0％，分别为53.8％，在1302nm处。 PTTPP电极的最高η在1050nm处为379.64cm 2 c 2 c 2。制造基于PTTPP，P（TTPP-CO-DTC）或P（TTPP-CO-DTP）作为阳极膜和PPRODOT-ET2作为阴极膜的三种ECDS。 PTTPP / PPRODOT-ET2 ECD显示出高透射率变化（588nm处的35.7％），高η（890.96cm 2·c？1，588nm）。 P（TTPP-Co-DTC）/ pProdot-ET2和P（TTPP-Co-DTP）/ PProdot-ET2 ECD显示出高透射率变化，快速响应时间，足够的开路存储器，以及良好的电化学氧化还原稳定性。基于这些调查结果，这项工作提供了对适当设计的高透射率变化和高效多彩色电致变色聚合物的新见解。
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