Electrochemiluminescence emission from carbon quantum dot-sulfite coreactant system

Dong, Yongqiang; Chen, Congqiang; Lin, Jiaming; Zhou, Nana; Chi, Yuwu

doi:10.1016/j.carbon.2012.12.086

Cited by 110 publications

(73 citation statements)

References 23 publications

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“…Up to now, the coreactant ECL of CD-S 2 O 8 2− system has been well studied and used in sensors [57,121,[213][214][215][216][217][218][219]. Besides S 2 O 8 2− , SO 3 2− and L-cysteine (L-Cys) were subsequently found to be able to enhance the cathodic ECL signal of CDs [211,212]. However, an anodic polarization was found to be essential for both SO 3 2− (Fig.…”

Section: Ecl Mechanismsmentioning

confidence: 94%

“…b ECL transients of CDs by stepping potential (upper curves) between +1.8 and −1.5 V [44]. c ECL spectra of CDs [212]. d Schematic illustration of the ECL and PL mechanisms in CDs.…”

Section: Ecl Mechanismsmentioning

confidence: 99%

“…24c). The maximum wavelengths of the ECL emission ranged from 535 to 600 nm, which were substantially red-shifted from those of the corresponding PL emission [44,57,68,211,212]. Accordingly, the ECL activities of CDs were considered to be mainly attributed to the surface states.…”

Section: Ecl Mechanismsmentioning

confidence: 99%

“…The ECL behaviors of CD-L-Cys system is quite similar with those of CD-SO 3 2− system. The electrochemical oxidation of cysteine (RSH) in the anodic polarization process produced (RO • ), which [212]. c Schematic diagram for the ECL reaction mechanism of CD-SO 3 2− system [212] was further oxidized to RSO 2 • by O 2 dissolved in the solution.…”

Section: Ecl Mechanismsmentioning

confidence: 99%

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Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

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Carbon based dots (CDs) composed of sp 2 carbon structures and surface functional groups are a new kind of carbon nanomaterials, exhibiting unique luminescent properties due to the quantum confinement and edge effects. This chapter introduces CDs in detail from their synthetic strategies, morphological and structural characteristics, luminescent properties and mechanisms, and sensing applications. The synthesis methods are summarized as "top-down" and "bottomup" approaches. Luminescent properties discussed include photoluminescence, upconversion luminescence, chemiluminescence, electrochemiluminescence. Sensing applications mainly refer to the chemical and biological sensors based on the luminescent properties of CDs. This chapter provides an overview of the research field and gives future perspectives for developing the exciting materials.

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Section: Ecl Mechanismsmentioning

confidence: 94%

“…b ECL transients of CDs by stepping potential (upper curves) between +1.8 and −1.5 V [44]. c ECL spectra of CDs [212]. d Schematic illustration of the ECL and PL mechanisms in CDs.…”

Section: Ecl Mechanismsmentioning

confidence: 99%

Section: Ecl Mechanismsmentioning

confidence: 99%

Section: Ecl Mechanismsmentioning

confidence: 99%

See 2 more Smart Citations

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

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“…Pre-electrooxidation of SO 3 2À is essential for the generation of cathodic ECL of GQDs/ SO 3 2À system, which is similar with the previously reported carbon quantum dots/SO 3 2À system. [21] Thus, it implies that electrochemical oxidation of SO 3 2À into SO 3 * À free radical triggers a dissolved oxygen-involving autocatalytic oxidation cycle that produces strong oxidative free radical SO 4 * À required for cathodic ECL of GQDs. The anodically generated SO 4 * À reacts with subsequent cathodically produced negatively charged GQDs, i. e. GQDs * À , giving rise to excited-state GQDs, i. e. GQDs*.…”

Section: àmentioning

confidence: 99%

An Electrochemiluminescent Biosensor Based on Interactions between a Graphene Quantum Dot−Sulfite Co‐reactant System and Hydrogen Peroxide

Chen

et al. 2017

ChemElectroChem

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Dedicated to Professor Qinjin Wan on the occasion of his 60th birthdayGraphene quantum dots (GQDs) are recently emerging carbon nanomaterials. GQDs have been recognized as attractive electrochemiluminescence (ECL) luminophores, owing to their environmental friendliness, facile preparation, easy labeling, and high ECL activity. However, in terms of the co-reactant of GQDs ECL, only strongly oxidative S 2 O 8 2À has been well studied and applied in GQD-based ECL sensing, which seriously limits the application of GQD ECL sensors. In the present work, we found that the commonly used reducing reagent, sulfite (SO 3 2À ), could serve as a new type of co-reactant of GQD ECL. Moreover, GQDs exhibited much higher ECL activity than spherical carbon quantum dots when using SO 3 2À as the co-reactant, owing to more abundant surface states of GQDs. Further investigation showed that GQD/SO 3 2À ECL could be sensitively quenched by H 2 O 2 at physiological pH. On this basis, new, green, and simple ECL chemical and biological sensors have been proposed for the detection of H 2 O 2 and biologically interesting molecules such as glucose. Additionally, the ECL reaction and sensing mechanisms have also been studied and discussed.

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Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

et al. 2021

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The preparation of nanostructured carbon materials from chosen biomass through hydrothermal carbonization and pyrolysis processes by optimizing the reaction conditions is one of the bases for applying the product in certain of the development activities. The finished product more or less reflects the raw material and the way of preparation. Among the many products, carbon quantum dots (CQDs) have gained importance due to their bolstered characteristics and facile preparation. CQDs are zero‐dimensional (0D) nanomaterials which attracted attention in the recent past due to their excellent water solubility, unique optical properties, good electrical conductivity, eco‐friendliness, and biocompatibility. Small‐sized CQDs offer high surface area per unit volume, strong tunable fluorescence, photo‐luminescent emissions, and semiconducting properties. In this paper, identification of ideal raw materials, process parameters being followed in the preparation of CQDs through hydrothermal carbonization and pyrolysis techniques, and the properties of the resultant CQDs commensurate with the nature of process are reviewed.

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Electrochemiluminescence emission from carbon quantum dot-sulfite coreactant system

Cited by 110 publications

References 23 publications

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

An Electrochemiluminescent Biosensor Based on Interactions between a Graphene Quantum Dot−Sulfite Co‐reactant System and Hydrogen Peroxide

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

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