Chemiluminescence reaction of glucose-derived graphene quantum dots with hypochlorite, and its application to the determination of free chlorine

Hallaj, Tooba; Amjadi, Mohammad; Manzoori, Jamshid L.; Shokri, Roghayeh

doi:10.1007/s00604-014-1389-0

Cited by 119 publications

(50 citation statements)

References 34 publications

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“…For each ion, sensing has been reported through a variation in GQD fluorescence due to a quenching mechanism. The quenching of GQD fluorescence by dissolved ions has been attributed to both the formation of GQD‐ion complexes, resulting in non‐radiative electron transfer from the GQD excited state to the ion, and to disruption of the surface passivation of the GQD, which decreases the GQDs photoluminescent quantum yield …”

Section: Introductionsupporting

confidence: 91%

Graphene Quantum Dot Embedded Hydrogel for Dissolved Iron Sensing

et al. 2019

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A robust and accurate chemical sensor for dissolved iron has been developed, based on highly fluorescent graphene quantum dots (GQDs). This work describes the construction of a GQD embedded hydrogel that displays strong fluorescence emission from the bulk structure. The hydrogel is made from poly(2‐hydroxyethyl methacrylate) (pHEMA) and crosslinked by ethylene glycol dimethacrylate to form a water permeable, flexible and transparent material. Polymerisation in the presence of the GQDs physically entraps the fluorescent nanoparticles within the hydrogel. The fluorescence properties of the GQD‐pHEMA hydrogels have been thoroughly characterised, including by confocal microscopy in the first reported use of this technique for a GQD composite material. Sensing of dissolved Fe(III) by the GQD‐pHEMA hydrogels has been demonstrated, whereby the Fe(III) quenches the GQDs fluorescence emission. The GQD‐pHEMA hydrogels were selective to Fe(III) and showed a linear response for concentrations in the range of 10–200 μM.

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Section: Introductionsupporting

confidence: 91%

Graphene Quantum Dot Embedded Hydrogel for Dissolved Iron Sensing

et al. 2019

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“…The direct oxidization of GQDs by hypochlorite to elicit CL emission, was also reported by Hallaj et al [94] On this basis, the CL intensity of the GQDs-ClO − system was greatly enhanced (about 18-fold) in CTAB micellar medium, and the main luminous routes could also be attributed to GQDs*. Based on the earlier-mentioned findings, the CL intensity was proportionally increased with concentration of free chlorine, which was applied to detect free chlorine in tap and pool water samples with satisfactory results.…”

Section: Cds As Reductive Intermediatessupporting

confidence: 70%

Carbon dots‐involved chemiluminescence: Recent advances and developments

2018

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In recent years, more and more nanomaterials‐based chemiluminescence (CL) systems have appeared to improve the sensitivity and expand the scope of the analytical applications with the explosive growth and development of nanomaterials and technology. As a fascinating class of luminescent carbon nanomaterials, carbon dots (CDs) are now substantially studied in fabricating CL based assays due to their unique optical and mechanical properties. Herein, we summarize and highlight the current developments of CDs‐involved weak or ultraweak CL systems, as well as the corresponding mechanisms and proper applications in some fields. CDs can take part in the CL reactions as oxidants, emitting species directly involved in redox oxidation, energy acceptors of CL energy transfer, or even catalysts involving other luminophores. In fact, they always have more than one role in many cases, owing to the formation of various excited species with short life in CL systems. Therefore, in this review article, the most recent progress of the different CDs‐assisted CL systems including the mechanisms and applications are presented. Finally, the conclusions and future prospects of this field are also discussed. The significant features of the CDs‐based CL systems may open up new prospects and challenges in a wider range of fields.

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“…Various analytical methods have been reported for determination of hypochlorite, including electrochemical [5], chemiluminescence [6], colorimetric [7] and fluorescence methods [8]. Among these methods, fluorescence methods have received considerable attention in terms of their high sensitivity, selectivity, fast response and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Copper nanocluster-based fluorescent probe for hypochlorite

2015

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Copper nanoclusters (Cu-NCs) were fabricated by chemical reduction of Cu(II) ions using formaldehyde as the reductant and poly(vinyl pyrrolidone) as the protecting agent. The resulting Cu-NCs were characterized by TEM, FT-IR, UV-vis and XPS and fluorescence spectroscopy. The CuNCs display a luminescence quantum yield of about 13 %, and the emission peaks shift from 398 to 457 nm on increasing the excitation wavelength from 310 to 390 nm. The Cu-NCs possess a storage stability of at least 2 months and are stable in the presence of high concentrations of salt. Their fluorescence is strongly quenched by hypochlorite, while other common cations, anions and hydrogen peroxide have minor (or no) effects on fluorescence. On this basis, a fluorometric hypochlorite assay was developed that has a 0.1 μM detection limit and a linear range that extends from 1 to 30 μM. The method was successfully used to the determination of hypochlorite in local tap water samples, and the results agreed well with those obtained by a colorimetric method.

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Chemiluminescence reaction of glucose-derived graphene quantum dots with hypochlorite, and its application to the determination of free chlorine

Cited by 119 publications

References 34 publications

Graphene Quantum Dot Embedded Hydrogel for Dissolved Iron Sensing

Graphene Quantum Dot Embedded Hydrogel for Dissolved Iron Sensing

Carbon dots‐involved chemiluminescence: Recent advances and developments

Copper nanocluster-based fluorescent probe for hypochlorite

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