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Near-infrared fluorogenic switches for the detection of Hg(II) ions: applications in real samples and living cells
[摘要] A unique turn-on NIR (near infrared) fluorescent sensor 9-(2-carboxyphenyl)-6-(diethylamino)-4-(4-(vinyloxy)benzylidene)-1,2,3,4-tetrahydroxanthylium (NIRM) specific for Hg2+ detection was designed and synthesized. Upon interaction with Hg2+, the probe NIRM exhibited considerable emission enhancement along with a large Stokes shift (>110 nm). The detection limit of NIRM for Hg2+ ions was 3.2 nM, which was lower than the maximum permissible limit of Hg2+ in drinking water recommended by the United States Environmental Protection Agency (USEPA). Consequently, the novel fluorescent sensor NIRM could be used for the recognition of Hg2+ in water samples as well as in living cells.
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[效力级别]  [学科分类] 分析化学
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