Size Determination of Gold Clusters by Polyacrylamide Gel Electrophoresis in a Large Cluster Region
Size Determination of Gold Clusters by Polyacrylamide Gel Electrophoresis in a Large Cluster Region
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通过聚丙烯酰胺凝胶电泳确定大簇区金簇的大小
DOI：
10.1021/jp808967p
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发表时间：
2009-08-13
影响因子：
3.7
通讯作者：
Tsukuda, Tatsuya
中科院分区：
文献类型：
--
作者：
Kimura, Keisaku;Sugimoto, Nobuyuki;Tsukuda, Tatsuya
聚丙烯酰胺凝胶电泳（PAGE）用于分离谷胱甘肽保护的金簇的组分，直到Au-160核心大小，并将大小与来自PAGE的迁移率数据进行比较。电喷雾质谱和透射电子显微镜系统地应用于分析金谷胱甘肽集群，从而隔离。我们发现，金原子簇化合物的迁移率与核中金原子数的对数呈线性关系。发现吸附在金核上的硫醇分子数的对数更好地拟合，并由一个简单的方程表示，该方程具有配体的构象和簇的电荷密度。因此，金属簇合物的迁移率与簇合物中配体的组成有关。
Polyacrylamide gel electrophoresis (PAGE) is used to separate the component of the glutathione protected gold clusters up to Au-160 core size and compare the size with the mobility data from PAGE. Both electrospray mass spectrometry and transmission electron microscopy were systematically applied to analyze Au-glutathione clusters thus isolated. We have found a linear relationship between the mobility of the gold cluster compounds to the logarithm of the number of gold atoms of the core. Better fitting to the logarithm of the number of thiolate molecules adsorbed on the gold core was found and was expressed by a simple equation that bears conformation of ligand and charge density of Clusters. Hence the mobility of the metallic clusters was correlated to the component of the ligand of the cluster.