在一个铁电液晶中使用双向性合性thioindigo dopant进行光诱导的极化反转
Jason Z Vlahakis1, Michael D Wand, Robert P Lemieux
1Department of Chemistry, Chernoff Hall, Queen's University, Kingston, Ontario, Canada K7L 3N6.
Journal of the American Chemical Society
|June 5, 2003
概括
这项研究证明了铁电液晶的光交换,通过使用单一的性剂逆转自发偏振. 这种新型的双向性兴奋剂可以实现这一点,而不会破坏SmC*阶段的稳定.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 液晶物理学 液晶物理学
背景情况:
- 铁电液晶 (SmC*) 呈现自发极化 (PS).
- 光交换通常需要外部刺激或复杂的分子设计.
- 在SmC*阶段控制PS标志反转是具有挑战性的.
研究的目的:
- 报告在铁电SmC*液晶中进行光交换的第一个例子.
- 为了实现自发偏振 (PS) 的光诱导信号逆转,使用单个合性合剂.
- 在光交换过程中保持SmC*相位稳定性.
主要方法:
- 合成和应用一种新的"双手"性质性兴奋剂:6-((R,R) -2,3-difluorooct-1-yloxy) -5 itro-6 itro-((R) -2-octyloxy) thioindigo.
- 利用印花核的光异构化来改变分子二极极 Moment.
- 调查不同侧链合对PS的影响.
主要成果:
- 观察到铁电SmC*液晶的成功光交换.
- 自发偏振 (PS) 的光诱导信号逆转,通过单一的合性剂实现.
- 在整个光交换过程中,SmC* 阶段保持稳定.
结论:
- 这种"双边"的配剂设计使铁电液晶的受控光交换成为可能.
- 分子设计允许在没有相位不稳定的情况下进行PS信号逆转.
- 这项工作为光敏铁电材料开辟了新的途径.
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