Nanocluster Size Evolution Studied by Mass Spectrometry in Room Temperature Au25(SR)18 Synthesis

被引：161
作者：
Dharmaratne, Asantha C. [1 ]
Krick, Thomas [2 ]
Dass, Amala [1 ]
机构：
[1] Univ Mississippi, Dept Chem & Biochem, University, MS 38677 USA
[2] Univ Minnesota, Dept Biochem Mol Biol & Biophys, St Paul, MN 55108 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 38期
关键词：
PROTECTED GOLD NANOCLUSTERS; LARGE-SCALE SYNTHESIS; SR CLUSTER COMPOUNDS; AU-25; CLUSTERS; METAL NANOPARTICLES; CRYSTAL-STRUCTURE; LIGAND-EXCHANGE; NANOMETER-SCALE; KDA GOLD; COMPLEXES;
D O I：
10.1021/ja906087a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We show that MALDI mass spectrometry, suitable for mixtures, is an indispensable tool in probing the mechanism of nanocluster synthesis enabling positive identification of nanoclusters. The size evolution of the mixture of larger clusters (Au-102, Au-68, Au-38) to form highly monodisperse Au-25 nanoclusters is demonstrated and probably includes the participation of Au(I) thiolate. The size evolution via structural reconstruction of the larger cores such as 38, similar to 44, 68, and 102 to a Au-25 nanocluster has been discussed.
引用
收藏
页码：13604 / +
页数：4
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