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Updated: Jan 15, 2026

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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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在Cu纳米集群中驱动创纪录的高NIR量子产量
Ze-Yu Liu1, Bao-Liang Han2, Min Wei3
1Department of Physics, Xiamen University, Xiamen 361005, P. R. China.
Journal of the American Chemical Society
|January 14, 2026
概括
具有近红外 (NIR) 发光的原子精确铜纳米集群 (CuNCs) 被设计为提高性能. 在溶液中显著提高了NIR光发光量子产量 (PLQYs),实现了创纪录的效率.
科学领域:
- 材料科学
- 纳米技术
- 摄影化学
背景情况:
- 原子精确的铜纳米集群 (CuNC) 由于其独特的特性,在生物医学和光电子领域具有潜力.
- 现有的CuNCs存在低室温 (RT) 溶液光发光量子产量 (PLQYs) 和氧化敏感性,限制了实际应用.
- 在解决方案中开发具有高NIR发光的CuNC对于推进这些应用至关重要.
研究的目的:
- 合成和描述具有明显联体外的新型15核铜纳米集群 (Cu NC).
- 调查连接体结构对光发光特性的影响,特别是NIR发射.
- 为提高溶液相NIR发射CuNC的性能制定战略.
主要方法:
- 两个结构定义的15核铜酸集群的合成:[Cu15-TPP]6[PET]13+ (Cu15-TPP) 和[Cu15-DPPB]3[PET]12H]2+ (Cu15-DPPB).
- 单晶X射线衍射 (SC-XRD) 用于结构的确定.
- 在溶液和固体状态下测量光发光量子产量 (PLQY).
- 激发状态动力学研究以阐明发光机制.
主要成果:
- 与Cu15- TPP (溶液中0. 2%) 相比,Cu15- DPB具有由于二氨酸合剂的 cis- cis 构造而具有硬化的连接体外,显著增强了NIR PLQY (37. 2%在溶液中,46%在固态中).
- 为Cu15-DPPB获得的37.2%溶液PLQY代表了溶液相NIR发射Cu-thiolateNC的最高报告.
- 结构分析显示了可比的Cu9核心,但影响光物理性质的表面连接物排列不同.
- 激发状态动力学表明,Cu15-DPPB中的表面刚性加快了系统间交叉 (ISC) 并增加了辐射衰变,同时抑制了非辐射衰变.
结论:
- 连接体构造工程是一种可行的策略,可以克服基于Cu的发射器的内在限制,例如弱自旋轨道合和缓慢的ISC.
- 在溶液中化CuNC的联体外可以显著提高NIR光发效率.
- 这项工作为开发各种应用的高性能溶液相室温NIR发光CuNC铺平了道路.
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