可见光激活的多色调节时间依赖的余光,通过矩阵转换触发可变的结合效应
Hongpu Xin1, Yunze Huang1, Weibo Zhang1
1Tianjin Key Laboratory of Chemical Process Safety, Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300401, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 24, 2025
概括
研究人员开发了多颜色可调色的依赖时间的后照色 (TDAC) 有机材料. 这些复合材料利用碳点 (CD) 和尿素 (U) 提供可调的后照,用于防伪等先进应用.
科学领域:
- 材料科学
- 有机化学
- 光物理学
背景情况:
- 在可见光激发下,在纯有机材料中实现多颜色可调性时间依赖的后照色 (TDAC) 是一个重大挑战.
- 现有的有机材料往往缺乏先进光学应用所需的可调性和稳定性.
研究的目的:
- 在可见光激发下开发新型有机复合材料.
- 阐明观察到的TDAC特性背后的机制.
- 探索这些材料在防伪和加密技术中的潜力.
主要方法:
- 使用各种前体合成TDAC复合物 (CD/U).
- 光物理性质的表征,包括后光衰变动态和光谱可调性.
- 研究矩阵转换和前体结构对TDAC行为的影响.
- 理论计算以了解矩阵在热激活延迟光 (TADF) 中的作用.
主要成果:
- 在可见光下成功制备了可调的多色TDAC复合材料 (CD/U).
- 确定TDAC机制是短寿命和更长寿命的后光组件的共存.
- 在p-phenylenediamine (p-PD) 衍生复合材料中表现出动态的TDAC行为,其红色光衰率取决于温度.
- 相关的合和 pyrrolic N 含量在矩阵中减少,排放寿命更短.
- 通过理论计算证实了矩阵在高效TADF中的关键作用.
- 根据不同二胺异构体 (p-PD, o-PD, m-PD) 在CDs形成过程中产生的结合度观察到不同的TDAC行为.
结论:
- 开发的CD/U复合材料为多色调TDAC提供了一个有前途的平台.
- 这项研究提供了通过操纵材料结构和矩阵组成来控制后光特性的见解.
- 这些材料在多模式防伪和多维加密方面具有很大的实际应用潜力.
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