Exploring the mobility of nanoscale polyoxometalates using gel electrophoresis
Exploring the mobility of nanoscale polyoxometalates using gel electrophoresis
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DOI：
10.1039/c1sc00542a
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发表时间：
2012-01
期刊：
影响因子：
8.4
通讯作者：
R. Tsunashima;Craig J. Richmond;L. Cronin
中科院分区：
文献类型：
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作者：
R. Tsunashima;Craig J. Richmond;L. Cronin
多金属氧酸盐团簇包含一个巨大的分子金属氧阴离子文库，具有很大的质量、大小和电荷范围，通常在一锅条件下形成，其中许多物种可能在任何给定的时间存在于溶液中。在这里，我们证明了传统的凝胶电泳法可以用于将基于金属氧化物的纳米材料从混合物中分离出来，结果是根据它们的表面电荷密度来识别团簇类型。特别是，我们证明了纳米尺度的团簇，与目前的理解相反，具有迁移率，这是高浓度下表面电荷密度的函数。这意味着，当考虑到金属氧化物纳米材料的结构多样性时，电荷、大小、形状或其他结构属性的变化会导致迁移率的不同，这可以用来表征和分离溶液中的纳米氧化物。
Polyoxometalate clusters encompass a vast library of molecular metal-oxo anions with a large range of mass, size, and charge and are generally formed under one-pot conditions, where many species may exist in solution at any given time. Herein we demonstrate that conventional gel electrophoresis can be used to separate metal oxide based nanomaterials from mixtures, and as a result identify cluster types as a function of their surface charge density. In particular we demonstrate that the nanoscale clusters, contrary to current understanding, have mobility that is a function of the surface charge density at high concentrations. This means that when considering the structural diversity of metal oxide nanomaterials, the variation of charge, size, shape or other structural properties causes a difference in mobility that can be used to both characterise and separate the nanoscale oxides in solution.