高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    

配体工程增强金纳米团簇的聚集诱导发光

叶伟卿1,6，逯 慧2，陈婉京1，李宁静1，张 瑜3，王丽华4，李 江4，诸 颖4，李明强5，樊春海5，贾思思2，陈 静4   

  1. 1. 中国科学院上海应用物理研究所 2. 张江实验室 3. 中国科学院上海高等研究院 4. 上海大学理学院材料生物学研究所 5. 上海交通大学化学化工学院 6. 中国科学院大学
  • 收稿日期:2025-04-03 修回日期:2025-04-18 网络首发:2025-04-21 发布日期:2025-04-21
  • 通讯作者: 陈静 E-mail:chenjing929@shu.edu.cn
  • 基金资助:
    国家重点研发计划(批准号：2023YFC3404200)资助

Aggregation induced emission enhancement of ligand-engineered Au Nanoclusters

YE Weiqing1,6, LU Hui2, CHEN Wanjing1, Li Ningjing1, ZHANG Yu3, WANG Lihua4, LI Jiang4, ZHU Ying4, LI Mingqiang5, FAN Chunhai5, JIA Sisi2, CHEN Jing4   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences

    2. Zhangjiang Lab

    3. Shanghai Advanced Research Institute, Chinese Academy of Sciences

    4. Institute of Materials Biology, School of Physics and Materials Science, Shanghai University

    5. School of Chemical Engineering, Shanghai Jiao Tong University 6. University of Chinese Academy of Sciences

  • Received:2025-04-03 Revised:2025-04-18 Online First:2025-04-21 Published:2025-04-21
  • Contact: CHEN Jing E-mail:chenjing929@shu.edu.cn
  • Supported by:
    Supported by the National Key Research and Development Program (No. 2023YFC3404200)

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摘要： 金纳米团簇的聚集诱导发光特性在生物成像、化学传感和光电器件领域展现出重要的应用潜力. 然而，如何通过有效设计增强金纳米团簇的聚集诱导发光仍具挑战性. 本研究报道了一种配体工程策略，在Au8纳米团簇中实现了显著的聚集诱导发光增强. 与溶液状态相比，聚集态Au8 纳米团簇的量子产率提升约90倍，发射强度增强达560倍. 通过结合光学表征和聚集体系中亚稳态组分的追踪，阐明了其聚集诱导发光机制. 由于该配体工程策略缩短了团簇间距(从1.31 nm压缩至0.72 nm)，进而有效抑制分子间旋转/振动弛豫，使得金纳米团簇的聚集诱导发光和结晶诱导发光都得到了增强. 这种空间位阻缩减策略为精准调控金纳米团簇在聚集态和晶态的光致发光行为建立了新范式.

关键词: 配体工程, 光致发光, 聚集诱导发光, 原子精确, 金团簇

Abstract: The aggregation-induced emission (AIE) properties of gold nanoclusters (Au NCs) exhibit significant potential for applications in bioimaging, chemical sensing, and optoelectronic devices. However, developing effective design strategies to achieve strong aggregation-induced emission enhancement (AIEE) in Au NCs remains a challenge. In this study, we report a ligand engineering approach to achieve remarkable AIE enhancement in Au8 nanoclusters. The quantum yield of aggregated Au8 NCs showed a ~ 90-fold increase compared to their solution state, with corresponding emission intensity enhancement reaching ~ 560-fold. Through combined optical characterization and metastable component tracking in aggregated systems, we elucidate the underlying AIEE mechanism. Both AIEE and crystallization-induced emission enhancement (CIEE) were activated through ligand engineering, which facilitated (1) shortened inter-cluster distances (from 1.31 nm to 0.72 nm) and (2) effective suppression of intermolecular rotational/vibrational relaxation. This steric-hindrance-reduction strategy establishes a new paradigm for precise modulation of photoluminescence in gold nanoclusters across both aggregated and crystalline states.

Key words: Ligand engineering, Photoluminescence, Aggregation induced emission, Atomically precise, Gold nanocluster

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