Quantitatively Monitoring the Size-Focusing of Au Nanoclusters and Revealing What Promotes the Size Transformation from Au44(TBBT)28 to Au36(TBBT)24

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• 作者：Lingwen Liao ; Chuanhao Yao ; Chengming Wang ; Shubo Tian ; Jishi Chen ; Man-Bo Li ; Nan Xia ; Nan Yan ; Zhikun Wu
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：December 6, 2016
• 年：2016
• 卷：88
• 期：23
• 页码：11297-11301
• 全文大小：420K
• ISSN：1520-6882

文摘

“Size-focusing” is a well-recognized process and widely employed for the synthesis of atomically monodisperse metal nanoclusters. However, quantitatively monitoring the size-focusing of Au nanoclusters has not been achieved yet, and the in-depth understanding of the size focusing is far from completed. Herein, we introduce a facile, cheap, and powerful tool, preparative thin-layer chromatography (PTLC), to quantitatively track the size-focusing process, to reveal that mainly ∼3 nm nanoparticles promote the transformation from Au₄₄(TBBT)₂₈ to Au₃₆(TBBT)₂₄ (where TBBT is 4-tert-butylbenzenethiolate) and to improve the syntheses of Au₄₄(TBBT)₂₈ and Au₃₆(TBBT)₂₄. Our work further demonstrates the usefulness of PTLC in nanocluster research and advances one step toward understanding the “size-focusing” process of nanoclusters.