安徽大学李漫波团队报道了位点识别诱导的金钳纳米团簇结构和光致发光演化。相关研究成果于2024年3月26日发表在国际顶尖学术期刊《美国化学会杂志》。

诱导的结构转变为精确调节金纳米团簇的精细结构和相应的性能提供了一种有效的方法，从而构成了团簇化学的重要研究课题之一。然而，在许多情况下，这些过程的驱动力和机制仍然不明确，限制了进一步的应用。

该文中，基于钳配体稳定的金纳米簇Au₈（PNP）₄的独特配位模式，研究人员揭示了金纳米簇诱导转化的位点识别机制。纳米团簇表面的“开放氮位点”与包括有机化合物和金属在内的不同诱导物相互作用，并分别触发Au₈（PNP）₄向Au₁₃和Au₉Ag₄纳米团簇的转化。对照实验验证了位点识别机制，飞秒和纳秒瞬态吸收光谱揭示了伴随结构转变的电子和光致发光演化。

附：英文原文

Title: Site-Recognition-Induced Structural and Photoluminescent Evolution of the Gold–Pincer Nanocluster

Author: Ying Zhang, Wei Zhang, Tai-Song Zhang, Chao Ge, Yang Tao, Wenwen Fei, Weigang Fan, Meng Zhou, Man-Bo Li

Issue&Volume: March 26, 2024

Abstract: The induced structural transformation provides an efficient way to precisely modulate the fine structures and the corresponding performance of gold nanoclusters, thus constituting one of the important research topics in cluster chemistry. However, the driving forces and mechanisms of these processes are still ambiguous in many cases, limiting further applications. In this work, based on the unique coordination mode of the pincer ligand-stabilized gold nanocluster Au8(PNP)4, we revealed the site-recognition mechanism for induced transformations of gold nanoclusters. The “open nitrogen sites” on the surface of the nanocluster interact with different inducers including organic compounds and metals and trigger the conversion of Au8(PNP)4 to Au13 and Au9Ag4 nanoclusters, respectively. Control experiments verified the site-recognition mechanism, and the femtosecond and nanosecond transient absorption spectroscopy revealed the electronic and photoluminescent evolution accompanied by the structural transformation.

DOI: 10.1021/jacs.3c12982

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.3c12982