Electrochromically and Photochromically Controllable Multifunctional OligoEDOT Derivatives
Electrochromically and Photochromically Controllable Multifunctional OligoEDOT Derivatives
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DOI：
10.1002/adfm.201700929
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发表时间：
2017-07
影响因子：
19
通讯作者：
S. Matsushita;Y. Jeong;Yoshinori Okada;Hiroyuki Hayasaka;K. Akagi
中科院分区：
文献类型：
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作者：
S. Matsushita;Y. Jeong;Yoshinori Okada;Hiroyuki Hayasaka;K. Akagi
通过双（三烷基甲锡烷基）-3，4-亚乙基二氧噻吩与带有光响应性二噻吩基乙烯（DE）部分的亚苯基或亚噻吩基衍生物之间的交叉偶联缩聚反应合成具有电致变色和光致变色性能的多官能共轭共低聚物。低聚物在电化学掺杂和脱掺杂时表现出主链的中性和氧化态之间的可逆变化。此外，低聚物在用紫外光和可见光照射时显示侧链中DE基团的开放和闭合形式之间的可逆光异构化。因此，低聚物具有各种电子结构，通过电化学掺杂和脱掺杂，和光异构化，产生四种类型的有色膜的低聚物系统中显示循环可逆的变化。在四种类型的电子结构中，只有具有开放形式的DE基团的无掺杂剂的低聚物膜显示可见荧光。据我们所知，本共轭低聚物是第一个表现出电致变色和光致变色功能与循环可逆性。
Multifunctional conjugated co‐oligomers with electrochromic and photochromic properties are synthesized by a cross‐coupling polycondensation reaction between bis(trialkylstannyl)‐3,4‐ethylenedioxythiophene and a phenylene or thienylene derivative bearing a photoresponsive dithienylethene (DE) moiety. The oligomer exhibits a reversible change between the neutral and oxidized states of the main chain upon electrochemical doping and dedoping. Furthermore, the oligomer shows reversible photoisomerization between the open and closed forms of the DE group in the side chain upon irradiation with ultraviolet and visible light. As a consequence, the oligomers possess various electronic structures that show cyclically reversible changes via the electrochemical doping and dedoping, and photoisomerization, producing four types of colored films in an oligomer system. Among the four types of electronic structures, only the dopant‐free oligomer film with the open form of the DE group shows visible fluorescence. To the best of our knowledge, the present conjugated oligomers are the first to exhibit both electrochromic and photochromic functions with cyclical reversibility.