Xiao Guowei, Zhou Bo, Fang Xiaoyu, Yan Dongpeng
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry Beijing Normal University, Beijing 100875, China.
College of Chemistry, Key Laboratory of Radiopharmaceuticals, Ministry of Education, Beijing Normal University, Beijing 100875, China.
Research (Wash D C). 2021 Apr 9;2021:9862327. doi: 10.34133/2021/9862327. eCollection 2021.
Long-persistent luminescence based on purely inorganic and/or organic compounds has recently attracted much attention in a wide variety of fields including illumination, biological imaging, and information safety. However, simultaneously tuning the static and dynamic afterglow performance still presents a challenge. In this work, we put forward a new route of organic-doped inorganic framework to achieve wide-range and multicolor ultralong room-temperature phosphorescence (RTP). Through a facile hydrothermal method, phosphor (tetrafluoroterephthalic acid (TFTPA)) into the CdCO (or Zn(OH)CO) host matrix exhibits an excitation-dependent colorful RTP due to the formation of diverse molecular aggregations with multicentral luminescence. The RTP lifetime of the doped organic/inorganic hybrids is greatly enhanced (313 times) compared to the pristine TFTPA. The high RTP quantum yield (43.9%) and good stability guarantee their easy visualization in both ambient and extreme conditions (such as acidic/basic solutions and an oxygen environment). Further codoped inorganic ions (Mn and Pb) afford the hybrid materials with a novel time-resolved tunable afterglow emission, and the excitation-dependent RTP color is highly adjustable from dark blue to red, covering nearly the whole visible spectrum and outperforming the current state-of-the-art RTP materials. Therefore, this work not only describes a combined codoping and multicentral strategy to obtain statically and dynamically tunable long-persistent luminescence but also provides great opportunity for the use of organic-inorganic hybrid materials in multilevel anticounterfeiting and multicolor display applications.
基于纯无机和/或有机化合物的长余辉发光最近在包括照明、生物成像和信息安全等广泛领域引起了广泛关注。然而，同时调节静态和动态余辉性能仍然是一个挑战。在这项工作中，我们提出了一种有机掺杂无机框架的新途径，以实现宽范围和多色的超长室温磷光（RTP）。通过简便的水热法，将荧光体（四氟对苯二甲酸（TFTPA））引入CdCO₃（或Zn₂(OH)₂CO₃）主体基质中，由于形成了具有多中心发光的不同分子聚集体，表现出依赖于激发的彩色RTP。与原始TFTPA相比，掺杂的有机/无机杂化物的RTP寿命大大提高（313倍）。高RTP量子产率（43.9%）和良好的稳定性保证了它们在环境和极端条件（如酸性/碱性溶液和氧气环境）下都易于可视化。进一步共掺杂无机离子（Mn和Pb）使杂化材料具有新颖的时间分辨可调余辉发射，并且依赖于激发的RTP颜色从深蓝色到红色高度可调，覆盖了几乎整个可见光谱，优于目前最先进的RTP材料。因此，这项工作不仅描述了一种结合共掺杂和多中心策略来获得静态和动态可调的长余辉发光，而且为有机-无机杂化材料在多级防伪和多色显示应用中的使用提供了巨大机会。
