Ultrasensitive and selective spectrofluorimetric determination of Hg(II) using a dimercaptothiadiazole fluorophore

Vasimalai, N.; John, S. Abraham

doi:10.1016/j.jlumin.2011.06.033

Cited by 28 publications

(21 citation statements)

References 33 publications

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“…1B) reveals an isosbestic point at 287 nm, which is attributed to the presence of both the Hg(II)-ADB18C6 complex and the free ADB18C6 in solution. 35 The uorescence spectra of ADB18C6 in the absence and presence of Hg(II) are likewise shown in Fig. 2.…”

Section: Uv-visible and Uorescence Studies On Hg(ii)mentioning

confidence: 97%

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

et al. 2017

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Section: Uv-visible and Uorescence Studies On Hg(ii)mentioning

confidence: 97%

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

et al. 2017

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“…The bridging molecule DMT is known to be an effective heavy metal ion-chelating ligand due to the presence of multiple active sites, including two thiocarbonyl S atoms and two N atoms. 42,43 By taking advantage of the strong coordination interaction between DMT and heavy metal ions, researchers have developed highly efficient heavy metal ion absorbents through the decoration of DMT onto the mesoporous silica gels 44,45 and polymer resins. 46 In addition to DMT's application in heavy metal ion remediation, publications on DMT-assisted heavy metal detection have appeared.…”

Section: Resultsmentioning

confidence: 99%

“…46 In addition to DMT's application in heavy metal ion remediation, publications on DMT-assisted heavy metal detection have appeared. For instance, Vasimalai and coworkers found that the fluorescence emission of DMT was significantly enhanced on coordination with Hg +2 , and they proposed a series of Hg 2+ -detection strategies using DMT 43 , DMT-stabilized silver nanoparticles 47 , and DMT-stabilized gold nanoparticles 48 as the fluorophores. Moreover, the use of DMT-monolayer-modified gold electrodes was reported to show improved sensitivity and selectivity for the electrochemical detection of lead(II) ions (Pb 2+ ).…”

Section: Resultsmentioning

confidence: 99%

Selective and Quantitative Detection of Trace Amounts of Mercury(II) Ion (Hg²⁺) and Copper(II) Ion (Cu²⁺) Using Surface-Enhanced Raman Scattering (SERS)

et al. 2015

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We report the development of a surface-enhanced Raman scattering (SERS)-based heavy metal ion sensor targeting the detection of mercury(II) ion (Hg(2+)) and copper(II) ion (Cu(2+)) with high sensitivity and selectivity. To achieve the detection of vibrational-spectroscopically silent heavy metal ions, the SERS substrate composed of gold nanorod (AuNR)-polycaprolactone (PCL) nanocomposite fibers was first functionalized using metal ion-binding ligands. Specifically, 2,5-dimercapto-1,3,4-thiadiazole dimer (di-DMT) and trimercaptotriazine (TMT) were attached to the SERS substrates serving as bridging molecules to capture Hg(2+) and Cu(2+), respectively, from solution. Upon heavy metal ion coordination, changes in the vibrational spectra of the bridging molecules, including variations in the peak-intensity ratios and peak shifts were observed and taken as indicators of the capture of the target ions. With rigorous spectral analysis, the coordination mechanism between the heavy metal ion and the corresponding bridging molecule was investigated. Mercury(II) ion primarily interacts with di-DMT through the cleavage of the disulfide bond, whereas Cu(2+) preferentially interacts with the heterocyclic N atoms in TMT. The specificity of the coordination chemistry provided both di-DMT and TMT with excellent selectivity for the detection of Hg(2+) and Cu(2+) in the presence of other interfering metal ion species. In addition, quantitative analysis of the concentration of the heavy metal ions was achieved through the construction of internal calibration curves using the peak-intensity ratios of 287/387 cm(-1) for Hg(2+) and 1234/973 cm(-1) for Cu(2+).

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“…Mercury vapor lamps, fluorescent lamps, electrical switches, batteries, thermometers and electrodes are the second largest sources of mercury discharge to the environment. In this regard, an ultrasensitive and selective spectrofluorimetric determination of Hg(II) using 2,5-dimercaptothiadiazole (DMT) as a fluorophore was developed (Vasimalai & John, 2011). In this study, the practical application of the present method was demonstrated by determining Hg(II) in tap water, river water and industrial waste water samples.…”

Section: Optical Sensorsmentioning

confidence: 99%

Current Achievement and Future Potential of Fluorescence Spectroscopy

Al-Rawashdeh¹

2012

Macro to Nano Spectroscopy

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Ultrasensitive and selective spectrofluorimetric determination of Hg(II) using a dimercaptothiadiazole fluorophore

Cited by 28 publications

References 33 publications

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

Selective and Quantitative Detection of Trace Amounts of Mercury(II) Ion (Hg²⁺) and Copper(II) Ion (Cu²⁺) Using Surface-Enhanced Raman Scattering (SERS)

Current Achievement and Future Potential of Fluorescence Spectroscopy

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Ultrasensitive and selective spectrofluorimetric determination of Hg(II) using a dimercaptothiadiazole fluorophore

Cited by 28 publications

References 33 publications

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

Rapid detection of mercury contamination in water by surface enhanced Raman spectroscopy

Selective and Quantitative Detection of Trace Amounts of Mercury(II) Ion (Hg2+) and Copper(II) Ion (Cu2+) Using Surface-Enhanced Raman Scattering (SERS)

Current Achievement and Future Potential of Fluorescence Spectroscopy

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Selective and Quantitative Detection of Trace Amounts of Mercury(II) Ion (Hg²⁺) and Copper(II) Ion (Cu²⁺) Using Surface-Enhanced Raman Scattering (SERS)