Recent Progress in Small-Molecule Fluorescent Probes for Detecting Mercury Ions

Yuan, Zeng-Hui; Yang, Yu‐Shun; Lv, Peng‐Cheng; Zhu, Hai‐Liang

doi:10.1080/10408347.2020.1797466

Cited by 35 publications

(11 citation statements)

References 93 publications

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“…Mercury (Hg 2+ ) is a highly toxic element that is widely present in the natural environment. With the rapid development of industry, many mercury-rich chemical and electronic products enter the natural environment after being scrapped. , The entrance of mercury into the food chain threatens human health and leads to a variety of diseases (e.g., failure of the brain, nervous system, and immune system) . Therefore, it is necessary to sensitively monitor the content of Hg 2+ in nature.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Ren,

Chen,

Wang

et al. 2023

Anal. Chem.

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Mercury (Hg2+) is a highly toxic element and can seriously affect human health. This work proposed a photoelectrochemical (PEC) sensor with a Z-scheme Fe2O3/CdS heterostructure and two thymine-rich DNA strands (DNA-1 and Au@DNA-2) for sensitive detection of Hg2+. The light excitation of the Fe2O3/CdS composite accelerated the electron transfer among Fe2O3, CdS, and the electrode to produce a stable photocurrent response. Upon the recognition of Hg2+ to thymine bases (T) in two DNA strands to form a stable T-Hg2+-T biomimetic structure, the photocurrent response increased with the increasing concentration of Hg2+ due to the opening of electronic transmission channels from Au nanoparticles to Fe2O3/CdS nanocomposite. Under the optimal conditions screened by the Box–Behnken experiments, the proposed PEC sensor showed excellent analytical performance for Hg2+ detection with high sensitivity, a detection limit of 0.20 pM at a signal-to-noise ratio of 3, high selectivity, a detectable concentration range of 1 pM–100 nM, and acceptable stability. The good recovery and low relative standard deviation for the analysis of Hg2+ in lake and tap water samples demonstrated the potential application of the designed Z-scheme Fe2O3/CdS heterostructure in the PEC detection of heavy metal ions.

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Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Ren,

Chen,

Wang

et al. 2023

Anal. Chem.

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“…Electrochemical technology, spectroscopy, and optical technology are also widely used in the detection of heavy metal ions . In addition, the development of a small molecule fluorescent probe also provides an effective way for biosensor and ion detection. , For example, rhodamine-based fluorescent probes can detect mercury ions through changes in color and fluorescence intensity . However, small molecule fluorescent probes also have some limitations and are easy to be disturbed by environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 For example, rhodamine-based fluorescent probes can detect mercury ions through changes in color and fluorescence intensity. 13 However, small molecule fluorescent probes also have some limitations and are easy to be disturbed by environmental conditions. At present, the widely used detection methods have high accuracy, but they often rely on laboratory-based technology and trained users, which cannot be widely used in an ordinary living environment.…”

Section: Introductionmentioning

confidence: 99%

Smart Wearable Fluorescence Sensing of Bacterial Pathogens and Toxic Contaminants by Eu³⁺-Induced Sodium Alginate/Ag Nanoparticle Aggregates

Tang

Wei

et al. 2022

ACS Appl. Nano Mater.

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Rapid detection of bacterial pathogens and toxic contaminants in the environment is essential for providing real-time results to mitigate potential safety hazards. This study prepared a wearable fabric sensing material based on fluorescent nanomaterials. The nano silver/europium complex is assembled layer by layer with sodium alginate to obtain nanoparticle aggregates with strong fluorescence, and then these are covalently bonded onto the cotton fabric surface to obtain the fluorescence cotton fabric (FCF). Via fluorescence quenching, FCF can sensitively sense Escherichia coli and Staphylococcus aureus and show good antibacterial activity. Besides, the selected transition metal ions can be detected qualitatively through the functional relationship between the fluorescence intensity and metal ion dose. The viability test of NIH3T3 cells showed that FCF had good biocompatibility. This fluorescent fabric sensing material has the characteristics of being wearable, antibacterial, and biocompatible. It realizes the real-time detection of bacteria and toxic metal ions and has great application prospects in environmental and biological monitoring.

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“…Therefore, a plethora of emissive molecular dyes have been synthetically modified to induce an alteration of their absorptive and/or emissive properties upon interacting with Hg 2+ . 52 − 57 As a case in point, a Hg 2+ -sensitive ″turn on″ molecular probe with an Fl backbone was recently reported, where a nonemissive fluorescein dithionocarbonate incurs a Hg 2+ -assisted hydrolysis leading to the release of Fl emissivity. 43 …”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the interest in real-time and field-deployable Hg sensing has motivated the development of a variety of optical probes offering faster, cheaper, and simpler operation than sophisticated traditional laboratory-based instrumentation. − These probes are also well-suited to simple and compact instrumentation platforms that are essential to point-of-need use. Therefore, a plethora of emissive molecular dyes have been synthetically modified to induce an alteration of their absorptive and/or emissive properties upon interacting with Hg 2+ . − As a case in point, a Hg 2+ -sensitive ″turn on″ molecular probe with an Fl backbone was recently reported, where a nonemissive fluorescein dithionocarbonate incurs a Hg 2+ -assisted hydrolysis leading to the release of Fl emissivity …”

Section: Introductionmentioning

confidence: 99%

Metal-Enhanced Hg²⁺-Responsive Fluorescent Nanoprobes: From Morphological Design to Application to Natural Waters

2022

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Metal-enhanced fluorescence (MEF) is a powerful tool in the design of sensitive chemical sensors by improving brightness and photostability of target-responsive fluorophores. Compounding these advantages with the modest hardware requirements of fluorescence sensing compared to that of centralized elemental analysis instruments, thus expanding the use of MEF to the detection of low-level inorganic pollutants, is a compelling aspiration. Among the latter, monitoring mercury in the environment, where some of its species disseminate through the food chain and, in time, to humans, has elicited a broad research effort toward the development of Hg 2+ -responsive fluorescent sensors. Herein, a Hg 2+ -sensitive MEF-enabled probe was conceived by grafting a Hg 2+ -responsive fluorescein derivative to concentric Ag@SiO 2 NPs, where the metallic core enhances fluorescence emission of molecular probes embedded in a surrounding silica shell. Time-resolved fluorescence measurements showed that the fluorophore’s excited-state lifetime decreases from 3.9 ns in a solid, coreless silica sphere to 0.4 ns in the core–shell nanoprobe, granting the dye a better resistance to photobleaching. The Ag-core system showed a sizable improvement in the limit of detection at 2 nM (0.4 ppb) compared to 50 nM (10 ppb) in silica-only colloids, and its effectiveness for natural water analysis was demonstrated. Overall, the reported nanoarchitecture hints at the potential of MEF for heavy metal detection by fluorescence detection.

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Recent Progress in Small-Molecule Fluorescent Probes for Detecting Mercury Ions

Cited by 35 publications

References 93 publications

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Smart Wearable Fluorescence Sensing of Bacterial Pathogens and Toxic Contaminants by Eu³⁺-Induced Sodium Alginate/Ag Nanoparticle Aggregates

Metal-Enhanced Hg²⁺-Responsive Fluorescent Nanoprobes: From Morphological Design to Application to Natural Waters

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Recent Progress in Small-Molecule Fluorescent Probes for Detecting Mercury Ions

Cited by 35 publications

References 93 publications

Photoelectrochemical Sensor with a Z-Scheme Fe2O3/CdS Heterostructure for Sensitive Detection of Mercury Ions

Photoelectrochemical Sensor with a Z-Scheme Fe2O3/CdS Heterostructure for Sensitive Detection of Mercury Ions

Smart Wearable Fluorescence Sensing of Bacterial Pathogens and Toxic Contaminants by Eu3+-Induced Sodium Alginate/Ag Nanoparticle Aggregates

Metal-Enhanced Hg2+-Responsive Fluorescent Nanoprobes: From Morphological Design to Application to Natural Waters

Contact Info

Product

Resources

About

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Photoelectrochemical Sensor with a Z-Scheme Fe₂O₃/CdS Heterostructure for Sensitive Detection of Mercury Ions

Smart Wearable Fluorescence Sensing of Bacterial Pathogens and Toxic Contaminants by Eu³⁺-Induced Sodium Alginate/Ag Nanoparticle Aggregates

Metal-Enhanced Hg²⁺-Responsive Fluorescent Nanoprobes: From Morphological Design to Application to Natural Waters