Recent Developments in Fluorescent Materials for Heavy Metal Ions Analysis From the Perspective of Forensic Chemistry

Lian, Jing; Xu, Qiang; Wang, Yipeng; Meng, Fanda

doi:10.3389/fchem.2020.593291

Cited by 29 publications

(13 citation statements)

References 74 publications

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“…[78] Lead, arsenic, iron, mercury, chromium, thallium, cadmium, silver, copper, and platinum are heavy metals and leads to uncommon symptoms and sometimes even death when exposed to chronic, acute, or acute-on-chronic levels. [79] Cadmium causes a degenerative bone disease; chromium and arsenic are carcinogens; and mercury and lead induce central nervous system damage. [80] Hence, sensitive and selective detection of these hazardous heavy metal ions has attracted great interest because of these adverse health effect and environmental problems.…”

Section: Coumarin Derivatives As Chemosensors For Heavy Metal Ionsmentioning

confidence: 99%

“…These elements are inorganic poisons that can harm human health depending on their chemical composition, mode of administration, and quantity [78] . Lead, arsenic, iron, mercury, chromium, thallium, cadmium, silver, copper, and platinum are heavy metals and leads to uncommon symptoms and sometimes even death when exposed to chronic, acute, or acute‐on‐chronic levels [79] . Cadmium causes a degenerative bone disease; chromium and arsenic are carcinogens; and mercury and lead induce central nervous system damage [80] .…”

Section: Coumarin Derivatives As Chemosensors For Heavy Metal Ionsmentioning

confidence: 99%

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Coumarin‐based Chemosensors for Metal Ions Detection

et al. 2022

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Coumarins, due to their intense and persistent emission of fluorescence, structural flexibility, and excellent biocompatibility, have become a popular choice in developing new fluorescent chemosensors. Coumarins have long been used for sensing anions, cations, chemically reactive nitrogen, oxygen, sulfur-containing species, and small molecules. They have also been shown to have applicability in imaging, biology, and medical research. Due to the widespread use and excellent biological activity, hundreds of such coumarin motifs have either been isolated from nature or synthesized in a laboratory. This review covers all the developments pertaining to the synthesis and use of coumarin for sensing a variety of metal ions (alkali, alkaline earth, transition, heavy, and noble metal ions). This comprehensive review includes an overview of the coumarin-based chemosensor's pH limit, detection limit, and binding mode. A brief explanation of the stoichiometric ratio between metal and chemosensor moiety and the applicability of each chemosensor is also given.

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Section: Coumarin Derivatives As Chemosensors For Heavy Metal Ionsmentioning

confidence: 99%

Section: Coumarin Derivatives As Chemosensors For Heavy Metal Ionsmentioning

confidence: 99%

Coumarin‐based Chemosensors for Metal Ions Detection

et al. 2022

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“…The advent of optoelectronic technology has generated a greater scope for developing highly efficient fluorescent materials having a broader range of emissive properties in the solid state. , Among these, organic fluorescent materials are gaining considerable recognition in contemporary research due to their potential applications in fluorescent sensors, , bioimaging, and optoelectronics. , The advantages of fluorescent organic materials include nontoxicity, excellent molecular designable capability, flexibility, low-temperature processing, lighter weight, and economic affordability. − Fine-tuning photoluminescence properties of fluorescent organic materials with efficiency, color, lifetime, and photostability are of great importance for wide-ranging applications. Generally, the photophysical properties of chromophores are tuned by a modification to their molecular structures. , However, some chromophores in the solution are weakly emissive due to the conformational flexibility, in particular, the E – Z isomerization of GFP chromophore (Figure S1, SI).…”

Section: Introductionmentioning

confidence: 99%

Polymorphs of Green Fluorescence Protein Chromophore Analogue: Fluorescence Switching with Thermal Stimuli

Mali

Dash

Vanka

et al. 2022

Crystal Growth & Design

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Polymorphs of fluorescent organic materials offer significant implications in optoelectronics and advanced materials as they modulate photoluminescence properties. A slight alteration in the conformation/ packing of molecules in the crystals shows variation in photoluminescence. This necessitates the polymorph screening of these materials to develop novel crystalline forms with distinct fluorescence emissions for broader application. In continuation of our work on the polymorph screening of Green Fluorescence Protein Chromophore (GFPc), we have synthesized a new imidazoline derivative, ethyl (Z)-2-(2-methyl-5-oxo-4-(3,4,5-trimethoxybenzylidene)-4,5-dihydro-1H-imidazol-1-yl)acetate (1). Polymorph screening of 1 under different crystallization conditions revealed three polymorphs, Form I (needle), Form II (block), and Form III (polycrystalline material). Forms I and II are the outcome of solution crystallization, whereas Form III was produced from the melt crystallization of Forms I and II. DSC, HSM, and powder and single-crystal XRD studies indicate the conversion of Form I and Form III crystals to Form II crystals on thermal stimuli. The photoluminescence studies revealed cyan, yellow, and yellowish-green fluorescence emission for Forms I, II, and III crystals, respectively. The difference in photoluminescence could be due to the variance in aggregation modes like H-aggregation in Form I and J-aggregation in Form II crystals. Form I, Form II, and Form III crystals also showed irreversible thermal fluorescent switching from cyan-yellow-green due to polymorphic phase transitions. The study correlates the direct observation of the modulation of the excited-state transition under thermal stimuli in the crystalline phase. It will help augment the pace in the research of thermally responsive fluorescent materials.

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“…Such a quenching is thought to be a result of intersystem crossing to an excited triplet state promoted by spin-orbit coupling of the excited (singlet) fluorophore and the halide upon contact [33], which is very sensitive to heavy metals contained in a solution [34]. In order for the selectivity of quantum yield of fluorescence to be advanced [35], there are two approaches, namely, (i) the molecular design of selective fluorescent probes [36][37][38][39] and (ii) applying new processing methods [40], which ensure the selective characteristics of fluorescence to a particular metal [41]; in particular, there is a high interest in designing multiband sensor array emission in a wide range of wavelengths [42]. The second direction involves using pattern recognition algorithms to process the vector signals generated by arrays of fluorescence sensors [43,44].…”

Section: Introductionmentioning

confidence: 99%

Toward a Selective Analysis of Heavy Metal Salts in Aqueous Media with a Fluorescent Probe Array

Melnikov

Bykov

Varezhnikov

et al. 2022

Sensors

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Detection of heavy meals in aqueous media challenges worldwide research in developing particularly fast and affordable methods. Fluorescent sensors look to be an appropriate instrument for such a task, as recently they have been found to have made large progress in the detection of chemical analytes, primarily in the environment, along with biological fluids, which still suffer from not enough selectivity. In this work, we propose a new fluorescent method to selectively recognize heavy metals in an aqueous solution via employing an array of several fluorescent probes: acridine yellow, eosin, and methylene blue, which were taken as examples, being sensitive to a microsurrounding of the probe molecules. The exemplary sensor array generated six channels of spectral information through the use of various combinations of excitation and detection wavelengths. Following the known multisensor approach, we applied a linear discriminant analysis to selectively distinguish the vector signals from the sensor array from salts of heavy metals—Cu, Pb, Zn, Cd, and Cz—at the concentration ranges of 2.41 × 10−6–1.07 × 10−5 M, 2.8 × 10−5–5.87 × 10−4 M, 1.46 × 10−6–6.46 × 10−6 M, 1.17 × 10−8–5.2 × 10−8 M, and 2.11 × 10−6–9.33 × 10−6 M, respectively. The suggested approach was found to be promising due to it employing only one cuvette containing the test solution, simplifying a sample preparation when compared to preparing a variety of solutions in tests with single fluorescence probes.

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Recent Developments in Fluorescent Materials for Heavy Metal Ions Analysis From the Perspective of Forensic Chemistry

Cited by 29 publications

References 74 publications

Coumarin‐based Chemosensors for Metal Ions Detection

Coumarin‐based Chemosensors for Metal Ions Detection

Polymorphs of Green Fluorescence Protein Chromophore Analogue: Fluorescence Switching with Thermal Stimuli

Toward a Selective Analysis of Heavy Metal Salts in Aqueous Media with a Fluorescent Probe Array

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