Fluorescent Gold Clusters as Logic Gates for the Detection of Different Metal Ions

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• 作者：Hung-Jen Cheng ; Chang-Long Kao ; Yan-Fu Chen ; Ping-Chih Huang ; Ching-Yun Hsu and Chun-Hsiung Kuei
• 刊名：Journal of the Chinese Chemical Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：64
• 期：2
• 页码：133-137
• 全文大小：506K
• ISSN：2192-6549

文摘

Metal cations can be selectively detected by restoring and quenching the fluorescent intensity of an “ON–OFF” gold nanocluster (Au NC) sensor. The fluorescent intensity of Au NCs with metal cations can be restored by chelating with ethylenediaminetetraacetic acid except for Hg²⁺ ions. A highly selective detection of Hg²⁺ ion is also achieved under the coexistence of Fe³⁺ or Cr³⁺ ions. This assay was applied successfully for detecting Hg²⁺ in a water sample. The dynamic range of the system was 1 ppm to 25 ppb, and the limit of detection was 25 ppb.