A smart “off–on” gate for the in situ detection of hydrogen sulphide with Cu(<scp>ii</scp>)-assisted europium emission

Liang, Zhenhao; Tsoi, Tik Hung; Chan, Chi Fai; Dai, Lixiong; Wu, Y.C.L.; Du, Guocheng; Zhu, Lizhi; Lee, Chi‐Sing; Wong, Wing Tak; Law, Ga Lai; Wong, Ka Leung

doi:10.1039/c5sc04091d

Cited by 62 publications

(33 citation statements)

References 40 publications

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“…Even if the LoD value of our method (14 μM) is lower with respect to other approaches reported in the literature (0.28 μM in [ 8 ] and 60 nM in [ 22 ]), it is fully in line with the legal requirements for the control of sulfide species in water (0.5 mg/L) [ 23 ].…”

Section: Resultssupporting

confidence: 63%

Sulfide Species Optical Monitoring by a Miniaturized Silicon Photomultiplier

Petralia

Sciuto

Santangelo

et al. 2018

Sensors

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The monitoring of water-soluble pollutants is receiving a growing interest from the scientific community. In this context, sulfide anion species S2− and HS− are particularly relevant since they can cause acute and chronic toxicity including neurological effects and at high concentrations, even death. In this study, a new strategy for fast and sensitive optical detection of sulfide species in water samples is described. The method uses an integrated silicon photomultiplier (SiPM) device coupled with the appropriate analytical strategy applied in a plastic microchip with dried reagents on board. More specifically, all sulfide species (H2S, HS− and S2−) in water samples are detected by the fluorescence signal emitted upon the reaction with N,N-dimethyl-phenylenediamine sulfate in the presence of Fe3+, leading to the formation of the fluorescent methylene blue (MB) species. It has been proven that the system herein proposed is able to measure sulfide concentration in a linear range from 0–10 mg L−1 with a sensitivity value of about 6.7 µA mg−1 L and a detection limit of 0.5 mg L−1. A comparison with conventional UV-Vis detection method has been also carried out. Data show a very good linear correlation (R2 = 0.98093), proving the effectiveness of the method. Results pave the way toward the development of portable and low-cost device systems for water-soluble sulfide pollutants.

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Section: Resultssupporting

confidence: 63%

Sulfide Species Optical Monitoring by a Miniaturized Silicon Photomultiplier

Petralia

Sciuto

Santangelo

et al. 2018

Sensors

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“…Especially, luminescent lanthanide MOFs have received intense interest owing to their large Stokes shifts, high color purity, and long luminescent lifetime [5][6][7]. The combination of inherent luminescence properties, together with the porosity of lanthanide MOFs, is suitable for the sensing of chemicals [8][9][10][11][12][13][14] and temperatures [15,16].…”

Section: Introductionmentioning

confidence: 99%

Waste PET as a Reactant for Lanthanide MOF Synthesis and Application in Sensing of Picric Acid

et al. 2019

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In this study, a lanthanide metal organic framework based on the ligand of terephthalic acid derived from waste polyethylene terephthalate (PET) bottles was designed and synthesized. The structure and morphology of the Tb-BDC was investigated by X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The Tb-BDC displays a high selectivity and sensitivity towards picric acid (TNP). The luminescence intensities exhibit a linear relation, with a concentration of TNP over the range of 1 × 10−5–1 × 10−4 M, with a limit of detection of 1 × 10−5 M. The sensing mechanism is also discussed. This is the first time that waste PET materials have been used as the starting precursor of terephthalic acid (BDC) for the fabrication of lanthanide MOF (metal organic framework), which is applied in sensing TNP.

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“…32,33 Designs of lanthanide probes for copper sensing include small molecule probes, [17][18][19][20][21][22][23][24][25][26][27] peptide mimics of metallo-protein binding sites, 45 nanoparticles, 8 and polymer-based materials. [34][35][36][37][38][39][40][41][42][43][44] The most typical design for small molecule copper sensors based on lanthanides are compounds that contain sensitizer-receptor units, as for example seen in the sensor S1 reported by Gunnlaugsson et al (Figure 1). 37 Here, the binding event causes changes to the photophysical properties of the sensitizer resulting in a modulation of the lanthanide luminescence signal.…”

Section: Introductionmentioning

confidence: 99%

A Luminescent NOTA-Based Terbium(III) “Turn-Off” Sensor for Copper

et al. 2019

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A bimacrocyclic luminescent terbium(III) sensor is reported for the selective 'turn-off' detection of Cu 2+ ions in aqueous solutions. The current sensor differentiates from previous sensors in that it offers the use of 1) time-gated luminescence detection to remove background signal, 2) a longer excitation wavelength of up to 350 nm for increased biocompatibility, and 3) a practically irreversible detection as a form of probing Cu 2+ ions with an extremely low limit of detection of about 1.7 nM. Synopsis: The detection of copper ions in aqueous solutions is an active and growing research field relevant to bioanalyses and environmental sampling. There is a high demand for sensitive and selective probes for copper in biological environment including intracellular monitoring. This would allow for a better understanding of the bivalent role of copper in the human body. Herein, we report a bimacrocyclic luminescent terbium(III) sensor for the selective 'turn-off' detection of Cu 2+ ions in aqueous solutions.

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A smart “off–on” gate for the in situ detection of hydrogen sulphide with Cu(ii)-assisted europium emission

Abstract: A novel responsive europium-based luminescence “off–on” gate for the in situ detection of H2S in water was developed.

Cited by 62 publications

References 40 publications

Sulfide Species Optical Monitoring by a Miniaturized Silicon Photomultiplier

Sulfide Species Optical Monitoring by a Miniaturized Silicon Photomultiplier

Waste PET as a Reactant for Lanthanide MOF Synthesis and Application in Sensing of Picric Acid

A Luminescent NOTA-Based Terbium(III) “Turn-Off” Sensor for Copper

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