Aggregation behavior of fullerenes in aqueous solutions: a capillary electrophoresis and asymmetric flow field-flow fractionation study

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• 作者：Alina Astefanei ; Oscar Nú?ez…
• 关键词：Capillary zone electrophoresis ; Cosmetic products ; Micellar electrokinetic capillary chromatography ; Asymmetric flow field ; flow fractionation ; Fullerene aggregates
• 刊名：Analytical and Bioanalytical Chemistry
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：407
• 期：26
• 页码：8035-8045
• 全文大小：1,796 KB
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• 作者单位：Alina Astefanei (1)
  Oscar Nú?ez (1) (2)
  Maria Teresa Galceran (1)
  Wim Th. Kok (3)
  Peter J. Schoenmakers (3)
  
  1. Department of Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
  2. Serra Húnter Fellow, Generalitat de Catalunya, Barcelona, Spain
  3. Analytical Chemistry Group, HIMS, University of Amsterdam, PO Box 94157, 1090 GD, Amsterdam, The Netherlands
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Food Science
  Inorganic Chemistry
  Physical Chemistry
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1618-2650

文摘

In this work, the electrophoretic behavior of hydrophobic fullerenes [buckminsterfullerene (C₆₀), C₇₀, and N-methyl-fulleropyrrolidine (C₆₀-pyrr)] and water-soluble fullerenes [fullerol (C₆₀(OH)₂₄); polyhydroxy small gap fullerene, hydrated (C₁₂₀(OH)₃₀); C₆₀ pyrrolidine tris acid (C₆₀-pyrr tris acid); and (1,2-methanofullerene C₆₀)-61-carboxylic acid (C₆₀CHCOOH)] in micellar electrokinetic capillary chromatography (MECC) was evaluated. The aggregation behavior of the water-soluble compounds in MECC at different buffer and sodium dodecyl sulfate (SDS) concentrations and pH values of the background electrolyte (BGE) was studied by monitoring the changes observed in the electrophoretic pattern of the peaks. Broad and distorted peaks that can be attributed to fullerene aggregation were obtained in MECC which became narrower and more symmetric by working at low buffer and SDS concentrations (below the critical micelle concentration, capillary zone electrophoresis (CZE) conditions). For the characterization of the suspected aggregates formed (size and shape), asymmetrical flow field-flow fractionation (AF4) and transmission electron microscopy (TEM) were used. The results showed that the increase in the buffer concentration promoted the aggregation of the particles, while the presence of SDS micelles revealed multiple peaks corresponding to particles of different aggregation degrees. Furthermore, MECC has been applied for the first time for the analysis of C₆₀ in two different cosmetic products (i.e., anti-aging serum and facial mask). Keywords Capillary zone electrophoresis Cosmetic products Micellar electrokinetic capillary chromatography Asymmetric flow field-flow fractionation Fullerene aggregates