期刊
ELECTROPHORESIS
卷 40, 期 9, 页码 1345-1352出版社
WILEY
DOI: 10.1002/elps.201800347
关键词
Capillary electrophoresis; Electrophoretic mobility; Gold nanoclusters; Size separation
资金
- National Natural Science Foundation of China [21777130, 21277109]
- Meritocracy Research Funds of China West Normal University [463132]
- Fundamental Research Funds of China West Normal University [416390]
Recently, water-soluble gold nanoclusters (AuNCs) have attracted more and more attention due to their unique properties. In this study, penicillamine-protected gold nanoclusters (Pen-AuNCs) were synthesized and initially fractionated by sequential size-selective precipitation (SSSP). The crude Pen-AuNCs and SSSP fractions were separated by capillary zone electrophoresis (CZE) with a diode array detector. The effects of key parameters, including the concentration of phosphate buffer, pH value and the ethanol content were systematically investigated. The separation of water-soluble poly-disperse AuNCs were well achieved at 30 mM phosphate buffer with 7.5% EtOH, pH 12.0, and applied voltage of 15 kV. The linear correlation between AuNCs diameter and mobility was observed. This finding provides an important reference for CE separation and product purification of water-soluble AuNCs or other nanomaterials.
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