Materials with tunable long persistent luminescence (LPL) properties have wide applications in security signs, anti‐counterfeiting, data encrypting, and other fields. However, the majority of reported tunable LPL materials are pure organic molecules or polymers. Herein, a series of metal‐organic coordination polymers displaying color‐tunable LPL were synthesized by the self‐assembly of HTzPTpy ligand with different cadmium halides (X=Cl, Br, and I). In the solid state, their LPL emission colors can be tuned by the time‐evolution, as well as excitation and temperature variation, realizing multi‐mode dynamic color tuning from green to yellow or green to red, and are the first such examples in single‐component coordination polymer materials. Single‐crystal X‐ray diffraction analysis and theoretical calculations reveal that the modification of LPL is due to the balanced action from single molecule and aggregate triplet excited states caused by an external heavy‐atom effect. The results show that the rational introduction of different halide anions into coordination polymers can realize multi‐color LPL.

中文翻译：

---

单组分配位聚合物中的多模式彩色可调长持久发光

具有可调节的长持续发光（LPL）特性的材料在安全标志，防伪，数据加密和其他领域中具有广泛的应用。但是，报告的大多数可调LPL材料是纯有机分子或聚合物。在此，通过HTzPTpy配体与不同卤化镉（X = Cl，Br和I）的自组装合成了一系列显示颜色可调LPL的金属有机配位聚合物。在固态状态下，它们的LPL发射颜色可以通过时间演变以及激发和温度变化进行调整，实现了从绿色到黄色或从绿色到红色的多模式动态颜色调整，并且是单个示例中的第一个此类示例。组分配位聚合物材料。单晶X射线衍射分析和理论计算表明，LPL的改性是由于外部重原子效应引起的单分子和聚集三重态激发态的平衡作用所致。结果表明，将不同卤化物阴离子合理引入配位聚合物可以实现多色LPL。