Abstract
Mercury can cause a variety of physical diseases and even death due to its complicated biological toxicity. The detection of mercury ions is therefore of great significance. In this study, we designed a new rhodamine-based fluorescent probe Hg664 which shows a large Stokes-shift for Hg2+ detection. The probe was developed employing Hg2+-enhanced desulfurization-cyclization reaction, and demonstrated high selectivity, excellent sensitivity (LOD 1.87 ppb), and fast responsive profile (within 30 s). Besides, the probe was successfully applied for the detection of Hg2+ ions in different real water samples, and satisfactory results were obtained, indicating that the probe may be a potential method for detecting Hg2+ in the ecosystem.
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