Electrogenerated chemiluminescence (ECL) of quantum dots (QDs), including CdS, CdSe, CdTe, and CdSe@ZnS QDs, was comparatively studied in neutral lucigenin solution without coreactants. Cathodic ECL signals were obtained at -1.2 V at different QDs modified gold electrodes (QDs/GEs) and the strongest ECL emission was obtained at the CdSe@ZnS QDs modified GE, which is nearly 7-times larger than other QDs modified GEs. The electrochemical results and the ECL spectrum revealed that the luminophor of the cathodic ECL is the excited state of QDs but not lucigenin, revealing that lucigenin can act as coreactant to generate cathodic ECL with QDs. Several impact factors, such as the amount of QDs, the supporting electrolytes, and the pH were investigated. Under the optimal condition, catechol exhibited apparent inhibiting effect on the cathodic ECL signal, based on which a new ECL sensor was developed and applied in the sensitive detection of catechol. The inhibited ECL intensity varied linearly with catechol concentration in the range of 5-1000 nM with a detection limit of 2 nM (S/N=3). The ECL sensor exhibited satisfied stability, repeatability, and selectivity. The mechanism of cathodic ECL was also proposed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.talanta.2015.08.054 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Highly electroactive thiazolium [5,4-d]thiazol-2,5-dicarboxylic acid-silver electrochemiluminescent metal-organic frameworks: synthesis, properties and application in glutathione detection.
Mikrochim Acta
January 2025
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi' an, 710069, PR, China.
Thiazolo[5,4-d]thiazole-2,5-dicarboxylic acid (HThz), a thiazolothiazole (TTz) derivative with carboxylic acid groups, was synthesized as a ligand for the creation of five MOFs, each associated with distinct metal ions including Ag, Mn, Co, Zn, and Cu. The cathodic electrochemiluminescence (ECL) of HThz and the resulting MOFs was investigated. HThz was found to generate ECL signals, but this process was heavily reliant on potassium persulfate (KSO) as a co-reactant.
View Article and Find Full Text PDFA Novel Molecularly Imprinted Electrochemiluminescence Sensor Based on Mxene Quantum Dots for Selective Detection of Oseltamivir in Biological Samples.
Molecules
January 2025
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
Oseltamivir is a drug that has been widely used to prevent and treat influenza A and B. In this work, an ultrasensitive, simple, and novel electrochemiluminescence (ECL) sensor combined with molecularly imprinted polymers (MIP-ECL) based on a graphene-like two-dimensional material, Mxene quantum dots (MQDs) was constructed to selectively detect oseltamivir. A molecularly imprinted polymer membrane containing an oseltamivir template was constructed by electropolymerization and elution of modified MQDs on a glassy carbon electrode.
View Article and Find Full Text PDFSingle-electrode electrochemiluminescence immunosensor for multiplex detection of Aquaporin-4 antibody using metal-organic gels as coreactant.
Biosens Bioelectron
March 2025
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui, 230026, China. Electronic address:
Reliable detection of Aquaporin-4 (AQP4) antibodies is crucial for diagnosing Neuromyelitis Optica spectrum disorder (NMOSD). However, cell-based assays, the most reliable approach, are limited by inadequate instruments. This study reports the use of silver metal-organic gels (Ag-MOGs) as coreactants in a single-electrode electrochemical system (SEES)-based electrochemiluminescence (ECL) immunosensor for multiplex detection of AQP4 antibodies.
View Article and Find Full Text PDFLaser-Treated Screen-Printed Carbon Electrodes for Electrochemiluminescence imaging.
Chem Biomed Imaging
December 2024
Department of Chemistry "G.Ciamician", University of Bologna, UE4, Via. P. Gobetti 85, 40129 Bologna, Italy.
Electrochemiluminescence (ECL) is nowadays a powerful technique widely used in biosensing and imaging, offering high sensitivity and specificity for detecting and mapping biomolecules. Screen-printed electrodes (SPEs) offer a versatile and cost-effective platform for ECL applications due to their ease of fabrication, disposability, and suitability for large-scale production. This research introduces a novel method for improving the ECL characteristics of screen-printed carbon electrodes (SPCEs) through the application of CO laser treatment following fabrication.
View Article and Find Full Text PDF2D Flower-like CdS@Co/Mo-MOF as Co-Reaction Accelerator of g-CN-Based Electrochemiluminescence Sensor for Chlorpromazine Hydrochloride.
Biosensors (Basel)
December 2024
Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, No. 174, Shapingba Main Street, Chongqing 400030, China.
In this study, we have proposed an electrochemiluminescence (ECL) signal amplification system which is based on two-dimensional (2D) flower-like CdS@Co/Mo-MOF composites as a co-reaction accelerator of the g-CN/SO system for ultrasensitive detection of chlorpromazine hydrochloride (CPH). Specifically, the 2D flower-like Co/Mo-MOF with mesoporous alleviated the aggregation of CdS NPs while simultaneously fostering reactant-active site contact and improving the reactant-product transport rate. This allowed the material to act as a novel co-reaction accelerator, speeding up the transformation of the SO into SO and enhancing the cathodic ECL emission of g-CN.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!