Thermally Activated Delayed Fluorescence-Based Near-Infrared-II Luminescence and Controlled Size Growth of Silver Nanoclusters

文献类型： 外文期刊

第一作者： Jiang, Wen-Hui

作者： Jiang, Wen-Hui;Zeng, Xiang-Ming;Wu, Minjian;Yao, Liao-Yuan;Yang, Guo-Yu;Qin, Lin;Yao, Liao-Yuan

作者机构：

关键词： multidentate chelate ligand; silver nanoclusters; NIR-II phosphorescence; TADF; cluster transformation; oxidative coupling of benzylamines

期刊名称：ACS NANO （ 影响因子：16.0； 五年影响因子：16.4 ）

ISSN： 1936-0851

年卷期： 2025 年 19 卷 7 期

页码：

收录情况： SCI

摘要： Due to the significant relationships between structure and properties, the controlled construction of atomically precise metal clusters presents both a formidable challenge and great importance. The innovative synthesis of well-defined silver nanoclusters with near-infrared II (NIR-II) luminescent properties may inspire further exploration of functional metal nanoclusters for bioimaging applications. In this study, we employed the multidentate chelating nitrogen ligand 3,5-di(2-pyridyl)pyrazole (Hbpypz) to construct three unprecedented silver nanoclusters: [Ag27(bpypz)14]3+ (Ag 27 ), [Ag62(bpypz)18]6+ (Ag 62 ), and [Ag91(bpypz)24]5+ (Ag 91 ). Single-crystal X-ray analysis indicated that these cluster structures stem from Ag13 units, exhibiting cluster-of-cluster configurations. By modulating the stoichiometry of the chelating ligand and silver centers, we achieved controlled size growth and reversible cluster-to-cluster conversions among these silver nanoclusters. Notably, the Ag 27 nanocluster exhibits an interesting thermally activated delayed fluorescence (TADF) based luminescence in the second near-infrared (NIR-II) region and demonstrates high catalytic efficiency in the oxidative coupling of benzylamines via a singlet oxygen (1O2) oxidation mechanism.

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