Carbon Quantum Dots' Synthesis with a Strong Chemical Claw for Five Transition Metal Sensing in the Irving-Williams Series

Carbon Quantum Dots' Synthesis with a Strong Chemical Claw for Five Transition Metal Sensing in the Irving-Williams Series

Carbon quantum dots (CQDs) are an excellent eco-friendly fluorescence material, ideal for various ecological testing systems. Herein, we establish uniform microwave synthesis of the group of carbon quantum dots with specific functionalization of ethylenediamine, diethylenetriamine, and three types o...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Vol. 12; no. 5; p. 806
Main Authors: Yakusheva, Anastasia, Sayapina, Anastasia, Luchnikov, Lev, Arkhipov, Dmitry, Karunakaran, Gopalu, Kuznetsov, Denis
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 27-02-2022
MDPI
Subjects:
Acids
Ammonia
Aquatic environment
Calcium ions
Carbon
carbon quantum dots
Cations
chelating agent
Chelation
Chemical interactions
Chemical synthesis
Complex formation
Copper
Diethylene triamine
Ethylenediamine
Fluorescence
fluorescence polarization
fluorescence properties
fluorescence quenching
Magnesium
Metal concentrations
Metal ions
Nanomaterials
Nickel
Nitrogen
Pollutants
Quantum dots
Regression analysis
Regression models
Salts
Series (mathematics)
Surface chemistry
surface design
Transition metals
Zinc
United Kingdom > UK
United States > US
surface design
transitional metal’s salts
chelating agent
carbon quantum dots
fluorescence quenching
aminopolycarboxylic acid (APCA)
fluorescence polarization
fluorescence properties
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Summary:Carbon quantum dots (CQDs) are an excellent eco-friendly fluorescence material, ideal for various ecological testing systems. Herein, we establish uniform microwave synthesis of the group of carbon quantum dots with specific functionalization of ethylenediamine, diethylenetriamine, and three types of Trilon (A, B and C) with chelate claws -C-NH . CQDs' properties were studied and applied in order to sense metal cations in an aquatic environment. The results provide the determination of the fluorescence quench in dots by pollutant salts, which dissociate into double-charged ions. In particular, the chemical interactions with CQDs' surface in the Irving-Williams series (IWs) via functionalization of the negatively charged surface were ascribed. CQD-En and CQD-Dien demonstrated linear fluorescence quenching in high metal cation concentrations. Further, the formation of claws from Trilon A, Trilon B, and C effectively caught the copper and nickel cations from the solution due to the complexation on CQDs' surface. Moreover, CQD-Trilon C presented chelating properties of the surface and detected five cations (Cu , Ni , Ca , Mg , Zn ) from 0.5 mg/mL to 1 × 10 mg/mL in the Irving-William's series. Dependence was mathematically attributed as an equation (ML regression model) based on the constant of complex formation. The reliability of the data was 0.993 for the training database.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano12050806