循环极化发光的光驱信号反转,通过胆固醇液晶中的二极化调制实现
Yang Li1, Yihan Chen1,2, Jiaxin Luo1
1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
Advanced materials (Deerfield Beach, Fla.)
|January 13, 2024
概括
研究人员开发了一种以光驱动的信息加密系统,使用响应刺激的循环极化发光 (CPL) 材料. 这种新的方法可以实现CPL标志反转,增强防伪技术.
科学领域:
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
- 摄影化学的使用.
背景情况:
- 响应刺激的循环极化发光 (CPL) 材料对于先进的信息加密和防伪应用至关重要.
- 在外部刺激下控制CPL属性是开发复杂安全功能的关键.
研究的目的:
- 在胆固醇液晶 (CLC) 系统中实现光驱动的CPL信号反转.
- 探索组合光响应和静态二合色染料用于多维信息加密的潜力.
主要方法:
- 在0.5:0.5的重量比率下将光响应性无线阴性双色素染料 (KG) 和静态无线阳性双色素染料 (NR) 纳入CLC主体.
- 利用365nm紫外线照射在KG染料中诱导trans/cis异体化,改变其二极化和CLC的CPL特性.
- 观察了g_lum的值的变化,并通过结合KG和NR的效应来实现CPL标志反转.
主要成果:
- 在紫外线照射下,KG染料的二重性下降,导致CLC-KG中的光色值从0.67减弱到0.28.
- 由光驱动的CPL信号逆转成功实现,通过用NR.用CLC-KG进行注,从-0.20/0.14过渡到-0.02/-0.04.
- 证明了多维信息加密CLC系统的可行性,利用协同循环极化和响应状态.
结论:
- 开发的CLC系统表现出可控制的光驱 CPL 信号反转.
- 该系统为先进的信息加密和防伪技术提供了一个有前途的平台.
- 光响应性和静态双色球剂的协同组合为创建复杂的光学安全功能提供了一个新的策略.
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