Jia Tao, Cheng Pei-Ming, Zhang Ming-Xuan, Liu Wei-Dong, Li Chong-Yang, Su Hai-Feng, Long La-Sheng, Zheng Lan-Sun, Kong Xiang-Jian
Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
J Am Chem Soc. 2024 Oct 23;146(42):28618-28623. doi: 10.1021/jacs.4c09447. Epub 2024 Oct 14.
Coinage-metal clusters with excellent luminescence properties have attracted considerable interest due to their intriguing structures and potential applications. However, achieving strong near-infrared (NIR) luminescence in these clusters is highly challenging. Here, we have successfully synthesized the first Ln/Cu bimetallic clusters, formulated as [LnCuOCl(2-MeO-PhC≡C)] (ClO) (Ln = Yb for , Er for , and Gd for ). Single crystal X-ray diffraction showed that the clusters have a three-layered core-shell structure, consisting of (LnO)@CuCl@Cu units protected by 36 2-MeO-PhC≡C ligands. Notably, the cluster exhibits significant NIR-II luminescence at 986 nm with the solid quantum efficiency of 33.3%, the highest among Cu clusters with NIR-II emission. This work not only reports the first category of Ln/Cu clusters but also presents a method to enhance NIR luminescence in coinage-metal clusters through the incorporation of Ln ions.
具有优异发光性能的硬币金属簇因其引人入胜的结构和潜在应用而备受关注。然而，在这些簇中实现强近红外（NIR）发光极具挑战性。在此，我们成功合成了首个镧系元素/铜双金属簇，其化学式为[LnCuOCl(2-MeO-PhC≡C)] (ClO)（Ln = Yb对应 ，Er对应 ，Gd对应 ）。单晶X射线衍射表明，这些簇具有三层核壳结构，由被36个2-MeO-PhC≡C配体保护的(LnO)@CuCl@Cu单元组成。值得注意的是，该簇在986 nm处表现出显著的近红外二区发光，固体量子效率为33.3%，是具有近红外二区发射的铜簇中最高的。这项工作不仅报道了第一类镧系元素/铜簇，还提出了一种通过引入镧系离子来增强硬币金属簇近红外发光的方法。
