Porphyrin Functionalized Carbon Quantum Dots for Enhanced Electrochemiluminescence and Sensitive Detection of Cu2+

Abstract

Porphyrin (TMPyP) functionalized carbon quantum dots (CQDs-TMPyP), a novel and efficient carbon nanocomposite material, were developed as a novel luminescent material, which could be very useful for the sensitive detection of copper ions in the Cu2+ quenching luminescence of functionalized carbon quantum dots. Therefore, we constructed a sensitive “signal off” ECL biosensor for the detection of Cu2+. This sensor can sensitively respond to copper ions in the range of 10 nM to 10 μM, and the detection limit is 2.78 nM. At the same time, it has good selectivity and stability and a benign response in complex systems. With excellent properties, this proposed ECL biosensor provides an efficient and ultrasensitive method for Cu2+ detection.

Thermally Activated Delayed Fluorescent Polymer Dots for Electrochemiluminescent Sensing of Cu2+ Ions

“…The low detection limit of PABPC5-Pdots/TEA is 0.16 nM when the signal-to-noise (S/N) equals 3, which is satisfactory and superior to other reported strategies (Table S6). − Ten metal–ion interferences Na + , Mg 2+ , Al 3+ , K + , Ca 2+ , Cr 3+ , Ni 2+ , Zn 2+ , Pb 2+ , and Bi 5+ (100 μM) were used to evaluate the specificity of the as-prepared ECL couple. Figure C shows good selectivity of the ECL system for Cu 2+ detection.…”

Recent Advances in Functional Nanomaterials for Electrochemical Sensors and Biosensors

“…Zhang et al synthesized porphyrin-functionalized carbon quantum dots through electrostatic interaction by a simple mixing method, which was used as a novel luminescent nanocomposite for the sensitive detection of copper ions in the Cu 2+ quenching luminescence of functionalized carbon quantum dots [8]. The constructed sensor could sensitively determine copper ions in the range of 10 nM to 10 µM, and the detection limit was 2.78 nM.…”

Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms

“…Since their discovery, CQDs have been widely used in fluorescence detection due to their superior optical characteristics. After appropriate functionalization, CQDs can be used as probes for the detection of heavy metal ions (Fe 3+ , Cr 6+ , Ag + etc) [68,69], harmful organic compounds and biomolecules, which is of great use in the food sector.…”