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Photoluminescence: Applications

Photoluminescence: Applications

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...

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空间和时间双分辨率的反假冒应用程序在长光照射系统基于木化物.

Xin Zhang¹, Jing-Xuan Hao¹, Mao-Lin Cai¹

¹Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.

Inorganic chemistry

|April 16, 2025

概括

本研究介绍了可调节的长持续发光 (LPL) 材料,用于先进的防伪. 这些新型金属化物提供可控制的颜色和持续时间,增强便携式系统的安全性.

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科学领域:

材料科学材料科学材料科学
摄影化学的使用.
固态化学固态化学

背景情况:

防伪技术越来越依赖于长持续发光 (LPL) 材料.
目前的LPL系统在整合可调节的发射颜色和发光寿命方面面临着挑战.
开发先进的便携式防伪解决方案需要具有增强安全功能的新材料.

研究的目的:

使用可调节的LPL材料开发一种新的时间和空间防伪策略.
调查激发波长和兴奋剂对LPL特性的影响.
为多色和时间解决的防伪系统奠定基础.

主要方法:

零维 (0D) 金属化物 (PBA) 3BiCl6:xSb3+ 的合成和表征.
在不同激发波长下研究长时间持久发光 (LPL) 特性.
对排放颜色转换和后照持续时间的分析.
探索三重能量传输 (TET) 机制,以控制LPL持续时间.

主要成果:

可控制的发射颜色从绿色到白色到色的转换是通过改变激发波长来实现的.
观察到可调节的后照持续时间,不同延迟时间出现不同的颜色.
在 (PBA) 3BiCl6 中的Sb3+兴奋剂通过三重能量转移 (TET) 有效调节了LPL持续时间.
使用手机手电筒实现了可见的后发光发光,证明了便携性.

结论:

开发的 (PBA) 3BiCl6:xSb3+材料为多色和时间解析的防伪提供了一个有前途的平台.
调整排放颜色和LPL持续时间的能力显著提高了安全性.
这些发现为先进的便携式防伪系统铺平了道路,这些系统具有较高的安全级别.