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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

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Published on: March 9, 2017

Single-Luminophore Ratiometric Electrochemiluminescence Based on Afterglow Emission from Defect-Engineered Carbon

Zhuoxin Ye¹, Yongli Wu¹, Chen Zhao¹

¹College of Chemistry, Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, Jilin University, Qianjin Street 2699, Changchun 130012, China.

Journal of the American Chemical Society

|April 7, 2026

Summary

Researchers developed a novel ratiometric electrochemiluminescence (ECL) sensing method using a single luminophore. This technique enhances signal reliability and enables ultrahigh sensitivity detection of biomarkers in complex samples.

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Area of Science:

Analytical Chemistry
Materials Science
Biotechnology

Background:

Ratiometric electrochemiluminescence (ECL) sensing enhances signal reliability but often requires complex dual-luminophore systems.
Existing methods face challenges in signal coherence and system complexity.

Purpose of the Study:

To establish a new ratiometric ECL sensing paradigm using a single luminophore.
To overcome the limitations of conventional dual-component ECL systems.
To develop an intrinsically self-referenced and highly sensitive ECL platform.

Main Methods:

Engineered nitrogen defect-rich carbon nitride to create defect electronic states for electron storage.
Utilized pulsed excitation to generate both conventional and afterglow ECL emissions from a single luminophore.
Synchronously modulated conventional and afterglow ECL signals for ratiometric analysis.

Main Results:

Demonstrated a single-component ratiometric ECL system with simultaneous conventional and afterglow emissions.
Achieved an intrinsically self-referenced platform with exceptional stability and ultrahigh sensitivity.
Successfully quantified exosomal microRNA at attomolar levels in complex biological samples.

Conclusions:

The developed single-component ratiometric ECL approach offers a simplified and highly effective sensing strategy.
This method provides a time-resolved, low-background analytical signal with improved reliability.
The framework can be broadly applied to expand the analytical capabilities of ECL sensing into the time domain.