Novel electrochromic and photoresponsive materials based on azobenzene-4,4′-dicarboxylic acid dialkyl ester derivatives (ADDEDs) were successfully prepared and characterized through nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and high-performance liquid chromatography-mass spectrometry. The electrochromic behavior, electrochromic mechanism, electro-optical properties, and photoresponsive properties of ADDEDs were investigated through cyclic voltammetry and ultraviolet-visible absorption spectra. ADDEDs displayed not only outstanding electrochromic behavior but also good and reversible photoisomerization properties even under electrochromic conditions. Electrochromic devices (ECDs) based on ADDEDs were fabricated, and their electrochromic performance was analyzed. The ECDs presented a color change from colorless to magenta between 0.0 V (bleached state) and ±3.0 V (colored state). In addition, the ECDs exhibited fast switching times, reasonable contrast, satisfactory optical memories, and redox stability. The novel redox-active azobenzene derivatives are promising candidates for full-color EC display devices, electronic paper, smart windows, optical memory devices, dual-stimuli-responsive systems, as well as other potential new applications.

中文翻译：

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基于偶氮苯-4,4'-二羧酸二烷基酯†的新型电致变色和光敏材料的合成与表征

成功地制备了基于偶氮苯-4,4'-二羧酸二烷基酯衍生物（ADDEDs）的新型电致变色和光敏材料，并通过核磁共振光谱，傅立叶变换红外光谱和高效液相色谱-质谱法对其进行了表征。通过循环伏安法和紫外可见吸收光谱研究了ADDEDs的电致变色行为，电致变色机理，电光性质和光响应性质。即使在电致变色条件下，添加物不仅显示出优异的电致变色行为，而且还显示出良好且可逆的光异构化性质。制作了基于ADDED的电致变色器件（ECD），并对其电致变色性能进行了分析。ECD在0.0 V（漂白状态）和±3.0 V（着色状态）之间呈现出从无色到品红色的颜色变化。此外，ECD还显示出快速的切换时间，合理的对比度，令人满意的光学记忆和氧化还原稳定性。新型氧化还原活性偶氮苯衍生物有望用于全彩色EC显示设备，电子纸，智能窗，光学存储设备，双刺激响应系统以及其他潜在的新应用中。