【摘要】 采用电化学原位紫外-可见光谱技术测定了双苄基取代紫精(DBV)和单苄基取代紫精(MBV)在氯化胆碱-乙二醇低共熔溶剂(DES)中的电致变色行为.结果表明:DBV和MBV分别呈现出无色/蓝色和无色/品红色的可逆电致变色响应.CIE色坐标分析显示:将DBV和MBV以1∶2(物质的量)比例进行混合,可在不同电压下获得从无色→蓝色→紫红色过渡的多彩电致变色响应.更多还原

【Abstract】 The electrochromic properties of monobenzyl-viologen(MBV) and dibenzyl-viologen(DBV) in chloride-ethylene glycol deep eutectic solvents(DES)are studied by cyclic voltammetry and in situ UV-vis spectroscopy. The results show that redox reactions of both viologens between bleached and colored state are reversible. The DBV showed a blue colored state and the MBV showed a magenta colored state,respectively. According to the CIE colorimetric data,with a solution containing the mixture of DBV and MBV in a molar ratio of 1∶2,multi-colored states from colorless→blue→red-violet under various voltages were observed.更多还原