Triple detection modes for Hg²⁺ sensing based on a NBD-fluorescent and colorimetric sensor and its potential in cell imaging

Abstract

The sensor provides highly Hg2+-sensitivity and can enhance the emission in live cell.

A Coumarin‐boronic Based Fluorescent “ON‐OFF” Probe for Hg2+ in Aqueous Solution

“…In addition, the detection limit of Hg 2+ in PBS solution was 5.7 × 10 –9 m (1.14 ppb), which is lower than the permitted levels of Hg 2+ in drinking water defined by WHO (6 ppb). [ 19 ] According to the Benisi–Hildebrand equation, [ 20 ] the binding constants K a of the probe 1 and Hg 2+ in the mixed solution and PBS solution were 3.99 × 10 4 m –1 (Figure 7d) and 6.01 × 10 4 m –1 (Figure S9, Supporting Information), respectively. Compared with recently reported fluorescent sensors for Hg 2+ , probe 1 showed considerably low limit of detection even in a biological PBS solution (see in Figure 6, Figure 7, and Table 1).…”

Sequential Injection Analysis for Rapid Determination of Mercury in Skincare Products Based on Fluorescence Quenching of Eco-Friendly Synthesized Carbon Dots

“…An alternative for optical sensing systems for the detection of Hg 2+ can also be based on the fluorescence assay because of its high sensitivity and fast analysis. Many fluorescent probes, including organic molecules, have been developed for fluorescent Hg 2+ detection in various samples based on the ionophore/fluorophore reagent. − However, some reagents have difficult and multi-step synthesis, a considerable amount of products, and chemical toxicity. In addition, most reagents are insoluble in an aqueous medium, which is an unfavorable condition of the sample preparation medium and of the flow-based system including the sequential injection analysis system (SIA).…”

Nitrogen and sulfur co-doped fluorescent carbon dots for the trapping of Hg(ii) ions from water

“…[9][10][11] Various methods employed for the detection of Hg 2+ ions with detection limits as low as of the order of nM to pM include atomic absorption spectroscopy (AAS), inductively coupled plasma-mass spectrometry (ICP-MS), cold vapor-atomic fluorescence spectroscopy (CV-AFS), as well as electrochemical and optical techniques. [12][13][14][15] Among all these methods, fluorescent chemosensors have provided a sensitive and efficient analytical method for the ultrasensitive detection of Hg 2+ ions. However, the major drawback of these methods is that the proposed technique can either detect a particular metal ion sensitively or scavenge the metal ions separately, thus limiting their practical applications.…”