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

Cheng HungJen | Zendy; Kao ChangLong | Zendy; Chen YanFu | Zendy; Huang PingChih | Zendy; Hsu ChingYun | Zendy; Kuei ChunHsiung | Zendy

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

Author(s) -

Cheng HungJen,

Kao ChangLong,

Chen YanFu,

Huang PingChih,

Hsu ChingYun,

Kuei ChunHsiung

Publication year - 2017

Publication title -

journal of the chinese chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.329

H-Index - 45

eISSN - 2192-6549

pISSN - 0009-4536

DOI - 10.1002/jccs.201600771

Subject(s) - chemistry , ethylenediaminetetraacetic acid , detection limit , fluorescence , metal ions in aqueous solution , ion , metal , chelation , quenching (fluorescence) , analytical chemistry (journal) , inorganic chemistry , chromatography , organic chemistry , quantum mechanics , physics

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 Hg 2+ ions. A highly selective detection of Hg 2+ ion is also achieved under the coexistence of Fe 3+ or Cr 3+ ions. This assay was applied successfully for detecting Hg 2+ in a water sample. The dynamic range of the system was 1 ppm to 25 ppb, and the limit of detection was 25 ppb.

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