A triphenylamine-based fluorescent probe with phenylboronic acid for highly selective detection of Hg²⁺ and CH₃Hg⁺ in groundwater

Abstract

Mercury is a highly toxic heavy metal and it poses a serious threat to the natural environment and human health. Thus, selective detection of trace mercury (e.g. inorganic mercury and...

Preconcentration and selective extraction of trace Hg(ii) by polymeric g-C3N4 nanosheet-packed SPE column

“…[6][7][8] To address this concern, the US Environmental Protection Agency has set a maximum limit of 2.0 ppb for Hg(II) in consumable water, and the World Health Organisation (WHO) emphasizes the importance of monitoring and evaluating such harmful metals. 9,10 However, directly detecting trace levels of Hg(II) in natural samples is challenging using common techniques like atomic uorescence spectrometry, X-ray uorescence, cold vapour atomic absorption, graphite furnace atomic absorption spectroscopy, inductively coupled plasma optical emission spectroscopy, and inductively coupled plasma mass spectrometry due to elemental interferences and sampling limitations. 11,12 Real-world samples contain numerous anions and cations that are much more abundant, leading to interference in the spectral analysis.…”

A mitochondrion-targeted fluorescent probe based on ESIPT phthalimide for the detection of Hg2+ with large Stokes shift

“…7 Thus, a variety of fluorescent probes have been developed for Hg 2+ detection, based on either coordination 8 or specific reactions. 9–17 Compared with the former, reaction-based fluorescent probes usually display high selectivity for Hg 2+ due to the high specificity of the reactions, including replacement of arylboronic acid, 10 oxymercuration, 11 deprotection of mercaptal 12 or vinyl ether, 13 desulfurization, 14 desulfurization-cyclization, 15 and desulfurization-hydrolysis. 16,17 However, some reaction-based Hg 2+ -specific fluorescent probes have one or more drawbacks, such as small Stokes shifts, long response times, non-physiological pH, tedious synthesis, and purification process.…”