Zhu Chen, Lu Luyao, Li Fei, Kang Xi, Zhu Manzhou
Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University Hefei Anhui 230601 P. R. China
Chem Sci. 2024 Sep 20;15(40):16637-44. doi: 10.1039/d4sc04884a.
Controllable transformation is a prerequisite to the in-depth understanding of structure evolution mechanisms and structure-property correlations at the atomic level. Most transformation cases direct the directional evolution of nanocluster sizes, , size-maintained, size-increased, or size-reduced transformation, while size disproportionation was rarely reported. Here, we report the Au-doping-induced size disproportionation of nanocluster transformation. Slight Au-doping on the bimetallic (AgCu) nanocluster produced its trimetallic derivative, (AuAgCu), following a size-maintained transformation. By comparison, the (AgCu) nanocluster underwent a size-disproportionation transformation under heavy Au alloying, leading to the formation of size-reduced (AuAgCu) and size-increased (AuAgCu) nanoclusters simultaneously. Such a size disproportionation among the nanocluster transformations was verified by the thin-layer chromatography analysis. This work presented a novel nanocluster transformation case with a size disproportionation characteristic, expected to provide guidance for the understanding of cluster size evolutions.
可控转变是在原子水平深入理解结构演化机制和结构-性能相关性的前提条件。大多数转变情况会引导纳米团簇尺寸的定向演化，即尺寸保持、尺寸增加或尺寸减小的转变，而尺寸歧化现象鲜有报道。在此，我们报道了金掺杂诱导的纳米团簇转变中的尺寸歧化现象。在双金属（AgCu）纳米团簇上轻微掺杂金会产生其三金属衍生物（AuAgCu），遵循尺寸保持转变。相比之下，（AgCu）纳米团簇在大量金合金化条件下会发生尺寸歧化转变，导致同时形成尺寸减小的（AuAgCu）和尺寸增加的（AuAgCu）纳米团簇。这种纳米团簇转变中的尺寸歧化通过薄层色谱分析得到了验证。这项工作展示了一种具有尺寸歧化特征的新型纳米团簇转变情况，有望为理解团簇尺寸演化提供指导。
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