基于谷胱甘肽修饰的金纳米簇选择性检测铜离子

安春 杜佩瑶 张振 卢小泉

引用本文: 安春,  杜佩瑶,  张振,  卢小泉. 基于谷胱甘肽修饰的金纳米簇选择性检测铜离子[J]. 分析化学, 2020, 48(3): 355-362. doi: 10.19756/j.issn.0253-3820.191668 shu
Citation:  AN Chun,  DU Pei-Yao,  ZHANG Zhen,  LU Xiao-Quan. Rapid and Highly Selective Detection of Copper Ion with Glutathione-capped Gold Nanoclusters[J]. Chinese Journal of Analytical Chemistry, 2020, 48(3): 355-362. doi: 10.19756/j.issn.0253-3820.191668 shu

基于谷胱甘肽修饰的金纳米簇选择性检测铜离子

  • 基金项目:

    本文系国家自然科学基金项目(Nos.21575115,21705117)资助

摘要: 建立了一种基于谷胱甘肽(GSH)包裹的金纳米簇(AuNCs)高选择性检测水中和血清中铜离子(Cu2+)的方法。Cu2+与AuNCs配体上的氨基(-NH2)和羧基(-COOH)发生配位作用,阻断配体-金属间或配体-金属-金属间的电荷转移,导致AuNCs的荧光猝灭; EDTA与Cu2+具有更强的配位作用,可将Cu2+从AuNCs表面移除,使AuNCs荧光恢复。本研究中,AuNCs发射红色荧光,避免了复杂生物基质背景荧光的干扰,在pH=5.5的条件下,可快速、灵敏、高选择性地检测Cu2+,检出限为23 nmol/L。血清和水样中Cu2+的加标回收率为96.2%~100.1%。本方法在药物分析、环境监测、临床诊断等方面具有广阔的应用前景。

English


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  • 收稿日期:  2019-11-13
  • 修回日期:  2020-01-03
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