Zhang Zhe, Bai Qixia, Zhai Zirui, Long Qingwu, Han Ermeng, Zhao He, Zhou Chuang-Wei, Lin Haobo, Zhang Wei, Ning Guo-Hong, Xie Ting-Zheng, Wang Pingshan, Wu Tun
Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, China.
College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, China.
Nat Commun. 2024 Aug 23;15(1):7261. doi: 10.1038/s41467-024-51792-x.
Effectively regulating monomer and excimer emission in a singular supramolecular luminous platform is challenging due to high difficulty of precise control over its aggregation and dispersion behavior when subjected to external stimuli. Here, we show a metallo-cage (MTH) featuring a triple helical motif that displays a unique dual emission. It arises from both intramolecular monomer and intermolecular excimer, respectively. The distorted molecular conformation and the staggered stacking mode of MTH excimer are verified through single crystal X-ray diffraction analysis. These structural features facilitate the switch between monomer and excimer emission, which are induced by changes in concentration and temperature. Significantly, adjusting the equilibrium between these two states in MTH enables the production of vibrant white light emission in both solution and solid state. Moreover, when combined with a PMMA (polymethyl methacrylate) substrate, the resulting thin films can serve as straightforward fluorescence thermometer and thermally activated information encryption materials.
在单一超分子发光平台中有效调节单体和准分子发射具有挑战性，因为当受到外部刺激时，精确控制其聚集和分散行为的难度很大。在此，我们展示了一种具有三螺旋基序的金属笼（MTH），它表现出独特的双发射。它分别来自分子内单体和分子间准分子。通过单晶X射线衍射分析验证了MTH准分子的扭曲分子构象和交错堆积模式。这些结构特征促进了单体和准分子发射之间的转换，这是由浓度和温度的变化引起的。值得注意的是，调节MTH中这两种状态之间的平衡能够在溶液和固态中产生充满活力的白色发光。此外，当与聚甲基丙烯酸甲酯（PMMA）基板结合时，所得薄膜可作为简单的荧光温度计和热激活信息加密材料。
