Journal
ANALYTICAL METHODS
Volume 11, Issue 21, Pages 2769-2777Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ay00241c
Keywords
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Funding
- Department of Science and Technology, Ministry of Science and Technology, Government of India [IF140098]
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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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