Fluorometric chemodosimetry. Mercury(II) and silver(I) indication in water via enhanced fluorescence signaling

Chae, Mi Young; Czarnik, Anthony W.

doi:10.1021/ja00050a085

Cited by 332 publications

(176 citation statements)

References 2 publications

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“…15,16 In recent years, many efforts have been made to design various specialty chemosensors for Hg 2+ ion detection. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] A very attractive approach focuses on the research of fluorescent Hg 2+ ion sensors, [33][34][35][36][37][38][39][40] which is highly effective for discriminating the presence of a target over the spectrally complex background inherent in real-world samples. Fluorescent probes for Hg 2+ have been designed based on a reversible or irreversible fluorescence reaction.…”

Section: Introductionmentioning

confidence: 99%

Determination of Mercury(II) in Aquatic Plants Using Quinoline-Thiourea Conjugates as a Fluorescent Probe

et al. 2013

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In this study, a quinoline-thiourea conjugate (1-phenyl-3-(quinoline-8-yl) thiourea, PQT) was synthesized and used as a fluorescence sensor to detect mercury ion. The observation is coincident with the well-documented phenomenon that a thiocarbonyl-containing group on a fluorochrome quenches the fluorescence due to the heavy atom effect of the S atom. The large fluorescence enhancement of PQT in the buffered MeCN-water mixture (1/1 v/v; HEPES 100 mM; pH 8.0) was caused by the Hg 2+ induced transformation of the thiourea function into a urea group. As such, protic solvents can be ascribed to hydrogen bond formation on the carbonyl oxygen to reduce the internal conversion rate. The fluorescence intensity of PQT was enhanced quantitatively with an increase in the concentration of mercury ion. The limit of detection of Hg 2+ was 7.5 nM. The coexistence of other metal ions with mercury had no obvious influence on the detection of mercury. A quinolone-thiourea conjugate was used as a fluorescent probe to detect Hg 2+ in aquatic plants and the experimental results were satisfactory.

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Section: Introductionmentioning

confidence: 99%

Determination of Mercury(II) in Aquatic Plants Using Quinoline-Thiourea Conjugates as a Fluorescent Probe

et al. 2013

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“…This is of course due to many advantages in characterizing this category of chemosensors, at top of which are the high selectivity and sensitivity toward targeted metal ions. Although these fluorometric sensors have been employed enormously in this field, the colorimetric sensing [8,28,[34][35][36] of metal ions has been shown to be less laboursome and intensive alternative to fluorescence techniques. The strong thiophilicity of mercury is the most attractive property that is usually taken into account when designing mercury detection systems, whether they are based on colorimetric or fluorometric spectral changes [35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…Although these fluorometric sensors have been employed enormously in this field, the colorimetric sensing [8,28,[34][35][36] of metal ions has been shown to be less laboursome and intensive alternative to fluorescence techniques. The strong thiophilicity of mercury is the most attractive property that is usually taken into account when designing mercury detection systems, whether they are based on colorimetric or fluorometric spectral changes [35][36][37][38][39][40]. However, investing this property in fluorescent chemosensors is not always wise and beneficial, since many metals that are less thiophilic than mercury (like silver, cadmium, and lead) can promote reactions similar to those of mercury and thus cause problematic sensing for mercury in relevant environments.…”

Section: Introductionmentioning

confidence: 99%

A Selective Chemosensor for Mercuric Ions Based on 4-Aminothiophenol-Ruthenium(II) Bis(bipyridine) Complex

Hamid

Al-Khateeb

Tahat

et al. 2011

International Journal of Inorganic Chemistry

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A new ruthenium(II) complex (cis-ruthenium-bis[2,2 -bipyridine]-bis[4-aminothiophenol]-bis[hexafluorophosphate]) has been synthesized and characterized using standard analytical and spectroscopic techniques, FTIR, 1 H and 13 C-NMR, UV/vis, elemental analysis, conductivity measurements, and potentiometric titration. Investigation of the synthesized complex with metal ions showed that this complex has photochemical properties that are selective and sensitive toward the presence of mercuric ion in aqueous solution. The detection limit for mercuric ions using UV/vis spectroscopy was estimated to be ∼ 0.4 ppm. The results presented herein may have an important implication in the development of a spectroscopic selective detection for mercuric ions in aqueous solution.

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“…1) 12 , and its application to monitoring of Hg 2+ in living cells and zebrafish as a model of vertebrate organisms 13 . Unlike other probes, which operate by reversible binding to metal ions, the response of this probe to Hg 2+ is associated with an irreversible chemical reaction 14 . In general, the signal intensities of reversible probes depend on the position of the binding equilibrium, which is sensitive to the environmental conditions, such as pH and the presence of other chelating molecules.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a highly metal-selective rhodamine-based probe and its use for the in vivo monitoring of mercury

Yang

Shin

et al. 2007

Nat Protoc

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This protocol describes detailed procedures for the preparation of a rhodamine-based mercury probe and for its applications to the detection of mercury in cells and vertebrate organisms. The mercury probe 1, which is prepared in two steps from rhodamine 6G, responds rapidly to Hg 2+ in aqueous solutions with a 1:1 stoichiometry. Owing to the fact that the probe reacts with Hg 2+ in an irreversible manner, it has advantages over other reversible mercury probes in in vivo assays with respect to both sensitivity and selectivity. In addition, fluorescent imaging assays of Hg 2+ in live cells and zebrafish by using this mercury probe are detailed in this protocol. The approximate time frame for the preparation of the probe is 24 h and for its use in imaging assays is 1.5 h.

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Fluorometric chemodosimetry. Mercury(II) and silver(I) indication in water via enhanced fluorescence signaling

Cited by 332 publications

References 2 publications

Determination of Mercury(II) in Aquatic Plants Using Quinoline-Thiourea Conjugates as a Fluorescent Probe

Determination of Mercury(II) in Aquatic Plants Using Quinoline-Thiourea Conjugates as a Fluorescent Probe

A Selective Chemosensor for Mercuric Ions Based on 4-Aminothiophenol-Ruthenium(II) Bis(bipyridine) Complex

Synthesis of a highly metal-selective rhodamine-based probe and its use for the in vivo monitoring of mercury

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