Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (8): 20250100.doi: 10.7503/cjcu20250100

• Articles: Inorganic Chemistry • Previous Articles     Next Articles

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,Shanghai 201800,China
    2.Zhangjiang Lab,Shanghai 201210,China
    3.Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China
    4.Institute of Materials Biology,College of Sciences,Shanghai University,Shanghai 201800,China
    5.School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
    6.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-04-03 Online:2025-08-10 Published:2025-04-21
  • Contact: JIA Sisi, CHEN Jing E-mail:jiass@zjlab.ac.cn;chenjing929@shu.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2023YFC3404200)

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 paper, we report a ligand engineering approach to achieve remarkable AIE enhancement in Au8 nanoclusters. The quantum yield of aggregated Au8 NCs showed a ca. 90-fold increase compared to their solution state, with corresponding emission intensity enhancement reaching ca. 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

CLC Number: 

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