Enrichment and sensitive detection of polyphenolic compounds via β-cyclodextrin functionalized fluorescent gold nanorods

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• 作者：Jinmei Luo ; Jiahui Zhang ; Jianxing Lin ; Jinhui Wang ; Peihui Yang
• 关键词：Gold nanorods ; β ; cyclodextrin ; Polyphenolic compounds ; Detection
• 刊名：Microchimica Acta
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：182
• 期：1-2
• 页码：201-208
• 全文大小：1,877 KB
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  18. Ha
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

We report on a simple and rapid method for the enrichment of polyphenolic compounds (pPhCs) by means of gold nanorods whose surface was functionalized with a monolayer of β-cyclodextrin (β-CD-AuNRs) via thiol chemistry. Enrichment is based on the formation of inclusion complexes between pPhCs and β-cyclodextrin through hydrophobic interactions and hydrogen bonding. Fourier transform infrared spectroscopy, mass spectrometry, and transmission electron microscopy were applied to confirm the inclusion of the pPhCs. Moreover, binding leads to a quenching of the red fluorescence of the AuNRs. This effect can be applied to quantify the polyphenols mangiferin, chrysin, and daphnetin with detection limits at 5 nM, 15 nM, and 20 nM concentrations, respectively. Water samples were spiked with pPhCs, and their extraction by using β-CD-AuNRs gave recoveries ranging from 97.6 to 110.2?%. Figure Gold nanorods were functionalized with β-cyclodextrin via thiol chemistry. Based on the formation of inclusion complexes between polyphenolic compounds (pPhCs) and β-cyclodextrin through hydrophobic interactions and hydrogen bonding, β-cyclodextrin functionalized gold nanorods as fluorescent probe to simple, rapid and quantitative detect polyphenolic compounds