A highly selective colorimetric and long‐wavelength fluorescent probe for the detection of Hg²⁺

Abstract

Currently, the fluorescent probe is an important method for detecting heavy metal ions, especially mercury ion (Hg ), which is harmful to the health of humans and the environment due to its toxicity and extensive use. In this paper, we designed and synthesized a colorimetric and long-wavelength fluorescent probe Hg-P with high sensitivity and excellent selectivity, which could detect Hg by the changes of visual color, fluorescence and absorption spectroscopy. With the addition of Hg to probe Hg-P solution, its color changed from yellow to pink, and showed a 171 nm red-shifted absorption spectrum. Probe Hg-P was used in real water and soil solution samples to detect Hg , and the result is satisfactory. Therefore, this new probe shows great value and application in detecting Hg in the environment.

Recent Progress in Fluorescent Probes For Metal Ion Detection

“…Wang et al ( Wang S. et al, 2021 ) synthesized thioctic acid-carbon dots (SCDs), which was used as an “off-on” type fluorescent probe in the detection of Hg 2+ . Xu et al ( Xu et al, 2018 ) expected to identify Hg 2+ by changes in fluorescence spectra and fabricated a colorimetric long-wavelength type fluorescent probe Hg-P to obtain higher selectivity. Tao et al ( Tao et al, 2020 ) synthesized a fluorescent probe based on a simple coumarin derivative, which could recognize mercury Hg 2+ selectively in aqueous solution.…”

A TCF-Based Carbon Monoxide NIR-Probe without the Interference of BSA and Its Application in Living Cells

“…An allyl ester and allyl ether group were installed onto TCF-OH and DCI-OH, constructing four potential CO fluorescent probes, TCF-ester, TCF-ether, DCI-ester, and DCI-ether (Scheme 1). TCF moiety as a strong intramolecular charge transfer (ICT) electron-withdrawing group has been widely used for the preparation of nonlinear optical materials [56,57], single-molecule imaging [58], and activated localization microscopy [59]. DCI moiety as an electron-withdrawing group in ICT probe possesses strong NIR fluorescence with a large Stokes shift over 100 nm and is widely applied in specific light-up bioprobes [60].…”

Synthesis of Sulfonylhydrazone Type Probe with High Selectivity for Rapid Detection of Mercury and Its Application in Adsorption and HeLa Cell

“…However, the spectrometric method has the advantages of simplicity, rapidity, low cost and high sensitivity, which is used in various fields. [12][13][14][15][16][17] In recent years, the spectrometric method had attracted the attention of many researchers because of its high selectivity, sensitivity, simplicity and real-time usability. [18][19][20][21][22][23] Until now, many excellent works about Hg 2＋ sensors have been successfully obtained through different designing thoughts by the introduction of special functional groups to different optical matrixes, and have displayed impressive probing performance.…”