Zhang Wei, Kong Jie, Liu Wen-Ting, Zhao Rui, Zhang Jiachen, Deng Hongjian, Lei Zhen, Wang Quan-Ming, Luo Yi, Zhou Meng
Department Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, P.R. China.
Angew Chem Int Ed Engl. 2025 Nov 17;64(47):e202515551. doi: 10.1002/anie.202515551. Epub 2025 Sep 25.
Triplet-state-based luminescence holds great promise for next-generation optoelectronic materials, yet its mechanistic modulation through structural control remains a fundamental challenge for nanomaterials. Here, we present a comparative study of two atomically precise nanoclusters, AuAg and AuAg, which feature an identical Au core but differ subtly in Ag atom count and ligand coordination. Despite their structural similarity and triplet dominated emission origin, the results herein reveal that AuAg exhibits phosphorescence, whereas AuAg demonstrates dual emission involving both phosphorescence and thermally activated delayed fluorescence (TADF). The contrasting behaviors arise from fine-tuning the silver contents and organic ligands, which alters photoluminescence nature without modifying the metal core. This work highlights a structure-driven approach to regulating triplet-state photoluminescence in metal nanoclusters and offers a blueprint for designing next-generation triplet-emissive materials.
基于三重态的发光在下一代光电器件材料方面具有巨大潜力，然而，通过结构控制对其进行机理调制仍然是纳米材料面临的一项基本挑战。在此，我们对两种原子精确的纳米团簇AuAg和AuAg进行了一项对比研究，它们具有相同的金核，但在银原子数量和配体配位方面存在细微差异。尽管它们结构相似且发射起源以三重态为主，但本文的结果表明，AuAg表现出磷光，而AuAg则呈现出包括磷光和热激活延迟荧光（TADF）的双重发射。这些截然不同的行为源于对银含量和有机配体的微调，这在不改变金属核的情况下改变了光致发光性质。这项工作突出了一种通过结构驱动的方法来调节金属纳米团簇中的三重态光致发光，并为设计下一代三重态发射材料提供了蓝图。
