Quantitatively Monitoring the Size-Focusing of Au Nanoclusters and Revealing What Promotes the Size Transformation from Au^sub 44^(TBBT)^sub 28^ to Au^sub 36^(TBBT)^sub 24

"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 fr...

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Published inAnalytical chemistry (Washington) Vol. 88; no. 23; p. 11297
Main Authors Liao, Lingwen, Yao, Chuanhao, Wang, Chengming, Tian, Shubo, Chen, Jishi, Li, Man-Bo, Xia, Nan, Yan, Nan, Wu, Zhikun
Format Journal Article
LanguageEnglish
Published Washington American Chemical Society 06.12.2016
Subjects
Atoms & subatomic particles
Chemical synthesis
Chromatography
Nanoparticles
Particle size
Silver
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Summary:"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 Au^sub 44^(TBBT)^sub 28^ to Au^sub 36^(TBBT)^sub 24^ (where TBBT is 4-tert-butylbenzenethiolate) and to improve the syntheses of Au^sub 44^(TBBT)^sub 28^ and Au^sub 36^(TBBT)^sub 24^. Our work further demonstrates the usefulness of PTLC in nanocluster research and advances one step toward understanding the "size-focusing" process of nanoclusters.
ISSN:0003-2700
1520-6882