Liquid-Phase Cyclic Chemiluminescence for the Identification of Cobalt Speciation

Analytical Chemistry, Journal Year: 2024, Volume and Issue: 96(9), P. 3933 - 3941

Published: Feb. 15, 2024

Accurate discrimination of metal species is a significant analytical challenge. Herein, we propose novel methodology based on liquid-phase cyclic chemiluminescence (CCL) for the identification cobalt speciation. The CCL multistage signals (In) luminol–H2O2 reaction catalyzed by different have decay coefficients k. Thereby, can facilely identify various according to distinguishable k values, including complicated and structurally similar complexes, such as analogues [Co(NH3)5X]n+ (X = Cl–, H2O, NH3), Co(II) porphyrins, bis(2,4-pentanedione) cobalt(II) derivatives. Especially, number substituent atoms also influences value greatly, which allows excellent between complexes that only subtle difference in group. In addition, linear discriminant analysis provides complementary solution improve differentiating ability. We performed density functional theory calculations investigate interaction mode H2O2 over species. A close negative correlation adsorption energy observed. Moreover, calculation evolutions decomposition into double hydroxide radical shows high level consistency exists activation barrier value. results further demonstrate coefficient signal associated with catalytic reactivity Our work not broadens application but technology speciation analysis.

Language: Английский

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Enhanced chemiluminescence resonance energy transfer using surfactant‐modified AIE carbon dots

Luminescence, Journal Year: 2024, Volume and Issue: 39(7)

Published: July 1, 2024

Chemiluminescence resonance energy transfer (CRET) efficiency can be enhanced by confining CRET donors and acceptors within nanoscale spaces. However, this is often affected uncertainties stemming from the random distribution of in such confined environments. In study, a novel nanospace was created through surfactant modification carbon dots (CDs) exhibiting aggregation-induced emission (AIE) characteristics. Hydrophobic could effectively nanospace. The distance between controlled anchoring AIE-CDs as acceptors, resulting significantly improved efficiency. Furthermore, AIE-CDs-based system successfully applied to detection hydrogen peroxide (H

Language: Английский

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COF-300-AR@CRL as a two-in-one nanocatalyst for one-step chemiluminescent detection of diphenyl ether herbicide residues in vegetable and fruit samples

Microchimica Acta, Journal Year: 2023, Volume and Issue: 190(12)

Published: Nov. 30, 2023

Language: Английский

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Development of a Novel Hplc-Cdcl Method Utilizing N-Carbon Dots for Highly Sensitive and Selective Determination of Dithiocarbamate Pesticides in Tea

Published: Jan. 1, 2024

In this study, S-methyl derivatives of dithiocarbamates (DTCs) were found to significantly enhance the chemiluminescence (CL) between Ce(IV) and efficient, environmentally friendly nitrogen-doped carbon dots (N-CDs). Based on elucidation CL mechanisms, an innovative approach high-performance liquid chromatography coupled with N-CDs materials detection (HPLC-CDCL) was first proposed. The developed method successfully applied highly sensitive determination three kinds DTCs fungicides (dimethyl dithiocarbamate, ethylene bisdithiocarbamate propylene bisdithiocarbamate) in tea. recovery established ranged from 70.51% 116.45% relative standard deviations below 9.40%. limit (S/N=3) as low 0.19 µg/L (as CS2), which is superior previous methods comparable UPLC-MS/MS. Moreover, present free solid phase extraction offers excellent selectivity. This study puts forward a novel idea for food safety environmental field.

Language: Английский

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Sensitive and Quick Electrochemiluminescence Biosensor for the Detection of Reactive Oxygen Species in Seminal Plasma based on the Valence Regulation of Gold Nanoclusters

Analytica Chimica Acta, Journal Year: 2024, Volume and Issue: 1330, P. 343284 - 343284

Published: Sept. 27, 2024

Language: Английский

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