Hysteretic Tricolor Electrochromic Systems Based on the Dynamic Redox Properties of Unsymmetrically Substituted Dihydrophenanthrenes and Biphenyl-2,2'-Diyl Dications: Efficient Precursor Synthesis by a Flow Microreactor Method.
Hysteretic Tricolor Electrochromic Systems Based on the Dynamic Redox Properties of Unsymmetrically Substituted Dihydrophenanthrenes and Biphenyl-2,2'-Diyl Dications: Efficient Precursor Synthesis by a Flow Microreactor Method.
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DOI：
10.3390/ma4111906
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发表时间：
2011-10-26
期刊：
影响因子：
--
通讯作者：
Yoshida JI
中科院分区：
文献类型：
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作者：
Ishigaki Y;Suzuki T;Nishida JI;Nagaki A;Takabayashi N;Kawai H;Fujiwara K;Yoshida JI
采用集成流动微反合成法，高效地合成了一系列在湾区含有两种芳基的联苯-2，2‘-二芳基双(二芳基甲醇)S 3。二元醇3NO/NX是不对称联苯配位化合物2NO/NX~(2+)的前体，它们在还原时通过2NO/NX~+·转化为相应的二氢菲1NO/NX，此时它们呈现两级变色。另一方面，在1NO/NX氧化为2NO/NX2+的过程中，中间体2NO/NX+·的稳态浓度可以忽略不计，这反映了独特的三色电致变色，具有滞后的颜色变化模式[颜色1→颜色2→颜色3→颜色1]。
A series of biphenyl-2,2'-diylbis(diarylmethanol)s 3, which have two kinds of aryl groups at the bay region, were efficiently obtained by integrated flow microreactor synthesis. The diols 3NO/NX are the precursors of unsymmetric biphenylic dications 2NO/NX2+, which are transformed into the corresponding dihydrophenanthrenes 1NO/NX via 2NO/NX+• upon reduction, when they exhibit two-stage color changes. On the other hand, the steady-state concentration of the intermediate 2NO/NX+• is negligible during the oxidation of 1NO/NX to 2NO/NX2+, which reflects unique tricolor electrochromicity with a hysteretic pattern of color change [color 1→color 2→color 3→color 1].