用于快速电化学调色胆固醇液晶的氧反应性化剂
Shoichi Tokunaga1, Yoshimitsu Itoh1, Hiroyuki Tanaka1
1Department of Chemistry and Biotechnology, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan.
Journal of the American Chemical Society
|August 3, 2018
概括
研究人员开发了一种新型的氧化还原活性合剂, 这一突破使得胆固醇液晶显示器能够快速,低压地切换颜色.
科学领域:
- 材料科学
- 有机化学
- 电化学
背景情况:
- 胆固醇液晶 (LC) 由于其螺旋结构而表现出独特的光学特性.
- 控制螺旋扭转功率 (HTP) 对于调整LC颜色至关重要.
- 在LC中现有的电色调制方法往往有缓慢的响应时间或高的操作电压.
研究的目的:
- 引入第一个氧化还原活性合剂,FcD,能够电调节其HTP.
- 为了证明用FcD杂的胆固醇LC介质的快速和可逆的电化学变色.
- 在响应时间和操作电压方面评估该系统的性能.
主要方法:
- 合成FcD,将一个轴向性双单元与一个氧化还原活性铁素单元结合起来.
- 用FcD对胆固醇LC (4'-pentyloxy-4-cyanobiphenyl) 进行注,并观察氧化后的颜色变化.
- 使用带有氧化电极的三明治型玻璃电池进行反射颜色的电化学调制.
主要成果:
- 合成的FcD剂成功诱导了胆固醇LC的蓝色反射颜色.
- 氧化FcD与四甲酸使其HTP降低了13%,使颜色变为绿色.
- 在+1.5V时,电化学控制在0.4秒内实现了蓝色变为绿色,在0V时返回蓝色.
结论:
- Fc D 是第一个已报道的氧化还原活性合剂,可以电调整 HTP 和 LC 的颜色.
- 采用Fc合剂的胆固醇LC系统显示了迄今为止电力驱动LC设备中最快的电化学反应和最低的操作电压.
- 这项工作为开发先进的电色材料和显示器开辟了新的途径.
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