Electrochemiluminescence from direct electro-oxidations of organic analyte rutin and its analytical application

Liang, Yao-Dong; Song, Junfeng

doi:10.1016/j.jelechem.2008.07.017

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…Therefore, ECL without using any luminescence agent is attractive. However, only a few ECL methods based on the luminescence property of the analyte itself without luminescence agents have been reported (19–21). The present work reports a stronger ECL of palmatine in NaOH solution at a vaseline‐impregnated graphite anode.…”

Section: Introductionmentioning

confidence: 99%

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Liang

Song

2011

Luminescence

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A strong electrochemiluminescence (ECL) of palmatine in NaOH medium was observed at a vaseline-impregnated graphite anode. The ECL production could be described as follows: hydroxyl radical (OH(•)) was generated via the oxidation of hydroxyl group (OH(-)) in NaOH medium, and the formed OH(•) subsequently oxidized palmatine base converted from palmatine in NaOH medium to the excited state oxypalmatine (oxypalmatine*). As the oxypalmatine* went back to its ground state, a stronger chemiluminescence was produced. Based on the ECL of palmatine, an ECL method for the determination of palmatine was proposed. An ECL signal of palmatine in NaOH solution was obtained by applying direct current of 15 mA to the vaseline-impregnated graphite anode. The ECL intensity was rectilinear with palmatine concentration in the range of 8.0 × 10(-7) to 2.0 × 10(-5) mol l(-1) and the limit of detection (signal-to-noise = 3) was 3 × 10(-7) mol l(-1) . The proposed method was applied to the determination of palmatine in pharmaceutical preparations.

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Section: Introductionmentioning

confidence: 99%

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Liang

Song

2011

Luminescence

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“…The oxidation peak at 0.63 V resulted from one-electron and one-proton oxidation at the hydrazine group and led to the formation of isoniazid hydrazyl radical [18][19][20]. The formed isoniazid hydrazyl radical, an unstable species, can be chemically oxidized by dissolved oxygen to an excited state that subsequently emitted light [21][22][23][24].…”

Section: Discussion Of the Possible Ecl Mechanismmentioning

confidence: 99%

Electrochemiluminescence from Isoniazid Itself and Its Analytical Application

Liang¹,

Shen²

2011

Pharm Anal Acta

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A weak electrochemiluminescence (ECL) of isoniazid in NaOH solution was observed at a platinum wire anode. When cetyltrimethylammonium bromide (CTAB) was present, the weak ECL was enhanced. The stronger ECL mechanism of isoniazid in NaOH-CTAB solution could be described as follows: isoniazid was electrochemically oxidized via one-electron and one-proton transfer to isoniazid hydrazyl radical. Then the formed radical was further chemically oxidized by dissolved oxygen to the excited state isonicotinate that subsequently emitted light. Based on the stronger ECL phenomenon of isoniazid, a flow injection ECL method for the determination of isoniazid was proposed. The ECL intensity was linear with isoniazid concentration in the range of 4.0 × 10 −7 to 1.0 × 10 −5 mol l −1 and the limit of detection (s/n = 3) was 1.9 × 10 −7 mol l −1. The proposed method was simple and convenient operation, and has been applied to the determination of isoniazid in pharmaceutical preparations and human urine.

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“…This phenomenon was related to the deepening of the deprotonation of the surface groups (-NH 2 and -SO x ) with the increase in pH value. The deprotonated surface functional groups further caused the changes in the fluorescence behavior of N, S-CDs [49]. Based on the above analysis, the solution with a pH value of 5.0 was selected for subsequent experiments.…”

Section: Fluorescence "Turn Off" Detection Of Rutinmentioning

confidence: 99%

Preparation of Nitrogen and Sulfur Co-Doped Fluorescent Carbon Dots from Cellulose Nanocrystals as a Sensor for the Detection of Rutin

Zhang

Song

et al. 2022

Molecules

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The poor water solubility, large particle size, and low accessibility of cellulose, the most abundant bioresource, have restricted its generalization to carbon dots (CDs). Herein, nitrogen and sulfur co-doped fluorescent carbon dots (N, S-CDs) were hydrothermally synthesized using cellulose nanocrystals (CNC) as a carbon precursor, exhibiting a small particle size and excellent aqueous dispersion. Thiourea was selected as a nitrogen and sulfur dopant to introduce abundant fluorescent functional groups into N, S-CDs. The resulting N, S-CDs exhibited nanoscale size (6.2 nm), abundant functional groups, bright blue fluorescence, high quantum yield (QY = 27.4%), and high overall yield (16.2%). The excellent optical properties of N, S-CDs endowed it to potentially display a highly sensitive fluorescence “turn off” response to rutin. The fluorescence response for rutin allowed a wide linear range of 0–40 mg·L−1, with a limit of detection (LOD) of 0.02 μM, which revealed the potential of N, S-CDs as a rapid and simple sensing platform for rutin detection. In addition, the sustainable and large-scale production of the N, S-CDs in this study paves the way for the successful high-value utilization of cellulose.

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Electrochemiluminescence from direct electro-oxidations of organic analyte rutin and its analytical application

Cited by 11 publications

References 35 publications

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Electrochemiluminescence from Isoniazid Itself and Its Analytical Application

Preparation of Nitrogen and Sulfur Co-Doped Fluorescent Carbon Dots from Cellulose Nanocrystals as a Sensor for the Detection of Rutin

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