Selective sensing of Hg2+ using rhodamine–thiophene conjugate: Red light emission and visual detection of intracellular Hg2+ at nanomolar level

Mandal, S. C.; Banerjee, Arnab; Lohar, Sisir; Chattopadhyay, Amarnath; Sarkar, Bidisha; Mukhopadhyay, Subhra Kanti; Sahana, Animesh

doi:10.1016/j.jhazmat.2013.07.026

Cited by 59 publications

(14 citation statements)

References 62 publications

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“…For example, 3-fold, 23-fold, and 100-fold increases in oxidation currents were obtained with po-Gr-, PEDOT:PSS-, and po-Gr-PEDOT:PSS-modified GCE's, respectively compared to 23.4 µA obtained with bare GCE (Figure 7). These I pa increases are attributed to the combined effects of sulfonic (Pillay et al, 2013) and thiol (Chandrasekhar et al, 2007;Kadarkaraisamy et al, 2011;Mandal et al, 2013) functional groups on PEDOT:PSS matrix/po-Gr nanocomposite (Shao et al, 2010;Anandhakumar et al, 2012). The effect of scan rate on the voltammograms of Hg 2+ at 0.4 mM concentration is shown in Figure 8A.…”

Section: Linear Sweep Voltammetrymentioning

confidence: 97%

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

et al. 2014

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Partially oxidized graphene flakes (po-Gr) were obtained from graphite electrode by an electrochemical exfoliation method. As-produced po-Gr flakes were dispersed in water with the assistance of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS). The po-Gr flakes and the po-Gr/PEDOT:PSS nanocomposite (po-Gr/PEDOT:PSS) were characterized by Raman spectroscopy, Fourier transform-infrared spectroscopy (FT-IR), UV-Vis spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). In addition, we demonstrated the potential use of po-Gr/PEDOT:PSS electrode in electrochemical detection of mercury ions (Hg 2+ ) in water samples. The presence of po-Gr sheets in PEDOT:PSS film greatly enhanced the electrochemical response for Hg 2+ . Cyclic voltammetry measurements showed a well-defined Hg 2+ redox peaks with a cathodic peak at 0.23V, and an anodic peak at 0.42V. Using differential pulse stripping voltammetry, detection of Hg 2+ was achieved in the range of 0.2-14 µM (R 2 = 0.991), with a limit of detection of 0.19 µM for Hg 2+ . The electrode performed satisfactorily for sensitive and selective detection of Hg 2+ in real samples, and the po-Gr/PEDOT:PSS film remains stable on the electrode surface for repeated use.Therefore, our method is potentially suitable for routine Hg 2+ sensing in environmental water samples.

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Section: Linear Sweep Voltammetrymentioning

confidence: 97%

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

et al. 2014

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“…There is a large number of research on rhodamine derivative sensors with 1:1 and 1:2 stoichiometry for Hg 2+ ions. In addition, Jana et al reported a rhodamine [36] and Wang et al [37] reported detection limits for the sensors they developed as 2.31 × 10 −8 , 1 × 10 −9 and 1.74 × 10 −6 M respectively. In addition to detection limit, the usability of the sensors in actual water samples is also important.…”

Section: Resultsmentioning

confidence: 99%

Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

et al. 2014

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The hexapodal Rhodamine B derivative compound 3 containing a cyclotriphosphazene core was synthesized and characterized by spectroscopic techniques such as FT-IR, (1)H, (13)C and (31)P NMR, HR-MS, MALDI MS and microanalysis. Compound 3 is a naked eye selective sensor with colorimetric and fluorescent properties for Hg(2+) ions in the presence of other metal ions such as Na(+), K(+), Ca(2+), Ba(2+), Mg(2+), Ag(+), Mn(2+), Cu(2+), Ni(2+), Co(2+), Pb(2+), Cd(2+), Zn(2+), Fe(2+), Fe(3+), and Cr(3+). The optical sensor properties of compound 3 were investigated using UV-vis and fluorescence spectroscopy. The lowest detection limit of compound 3 was determined as 3.76 × 10(-9) M (0.75 ppb) for Hg(2+) ions. The stoichiometry of compound 3-Hg(2+) complex was found to be 1:3 (ligand/metal ion). The reusable test strip was improved by the immobilization of compound 3 into a hydrogel network. The reusability of the sensor and test strip was tested with S(2-) ion solutions.

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“…Therefore, these probes are promising candidates for detection of hazardous species. Although, a number of these fluorescent probes have been reported for Hg 2+ detection, a vast number of them suffer from lack of efficiency in water, which is a prominent factor for a probe, since biological processes occur in aqueous medium. Besides, water is the most prevalent and undoubtedly the cheapest solvent with unique properties convenient for industrial uses which is then released to the environment as waste water.…”

Section: Introductionmentioning

confidence: 99%

A Schiff base‐grafted nanoporous silica material as a reversible optical probe for Hg²⁺ ion in water

Afshani

Badiei

Karimi

et al. 2017

Applied Organom Chemis

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A novel organic-inorganic silica-based fluorescent probe was designed, synthesized and characterized by different techniques such as XRD, BET, TGA, and FT-IR. The fluorescence properties of the probe were studied in the presence of a variety of metal-ions in water. The results revealed that various metal-ions negligibly vary the emission intensity of the probe except for Hg 2+ , which quenched the intensity dramatically. The selectivity of the probe toward Hg 2+ ion was further investigated in the presence of common competing metal-ions and the results demonstrated the high selectivity of the probe toward Hg 2+ ion. The fluorescence emission of the probe was also studied as a function of the concentration of Hg 2+ ion. A nanomolar limit of detection was estimated for Hg 2+ , indicating a high sensitivity. Furthermore, the probe showed INHIBIT-type logic behavior with Hg 2+ and H + as inputs. Also, the optimum pH range was studied in addition to reversibility and real world applicability of the probe.

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Selective sensing of Hg2+ using rhodamine–thiophene conjugate: Red light emission and visual detection of intracellular Hg2+ at nanomolar level

Cited by 59 publications

References 62 publications

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

A Schiff base‐grafted nanoporous silica material as a reversible optical probe for Hg²⁺ ion in water

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Selective sensing of Hg2+ using rhodamine–thiophene conjugate: Red light emission and visual detection of intracellular Hg2+ at nanomolar level

Cited by 59 publications

References 62 publications

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg2+ ions

A Schiff base‐grafted nanoporous silica material as a reversible optical probe for Hg2+ ion in water

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A Schiff base‐grafted nanoporous silica material as a reversible optical probe for Hg²⁺ ion in water