客人诱导的多色光发光的激活在纳夫他林比西米德液晶中的多色光发光
Johannes Nowarra1, Swadhin Garain1, Matthias Stolte1
1Institut für Organische Chemie and Center for Nanosystems Chemistry (CNC), Universität Würzburg, Würzburg, Germany.
Advanced materials (Deerfield Beach, Fla.)
|February 25, 2026
概括
研究人员开发了一种使用液晶 (LC) 调整光辐射颜色和寿命的超分子策略. 这种方法使先进的光学材料具有可调节的光发光,用于安全标签等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 光物理学的光学物理学
背景情况:
- 在可加工材料中实现可调节的发射是具有挑战性的.
- 现有的先进材料往往难以加工或仅限于不切实际的解决方案.
- 液晶 (LCs) 提供可加工性,但通常依赖外部剂进行颜色控制.
研究的目的:
- 提出激活和调整光发光 (PL) 颜色和液晶中的寿命的超分子策略.
- 探索纳二胺 (NBI) 液晶中富含电子的客体的使用.
- 在可加工材料中扩大可访问的发光范围.
主要方法:
- 使用了缺电子纳二氧化 (NBI) 液晶,形成柱状六角半相.
- 嵌入了富含电子的客体 (多环芳,碳醇衍生物,Pt (II) 复合物) 来诱导电荷转移 (CT) 状态.
- 雇佣主机 - - 将互补的NBI主机与单一的客人混合在一起,以创建能量传输级联.
主要成果:
- 从可见到近红外 (511-685 nm) 通过发射CT状态实现了可调节的发射.
- 观察到一系列的发光寿命,从短暂的光到长期的延迟发光 (热激活的延迟光和室温光).
- 通过共同组装系统中的能量传输级联,通过同时显示绿色和红色的双重排放.
结论:
- 添加剂诱导的激活和宿主混合方法显著扩大了在液晶中可实现的发光特性.
- 这种方法将可调节的光物理特性与固有的材料可加工性相结合.
- 开发的材料具有下一代光学编码和安全标签的潜力.
相关概念视频
Photoluminescence: Applications
1.2K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.2K
Photoluminescence: Fluorescence and Phosphorescence
4.1K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
4.1K


