Fluorescent sensing platform for low-cost detection of Cu2+ by coumarin derivative: DFT calculation and practical application in herbal and black tea samples

Objective & Hypothesis:A fluorogenic probe based on a coumarin-derivative for Cu2+ sensing in CH3 CN/H2 O media (v/v, 95/5, 5.0 μM) was developed and applied in real samples. 3-(4-chlorophenyl)-6,7-dihydroxy-coumarin (MCPC) probe was obtained by synthetic methodologies and identified by spectral techniques.

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Key Findings & Data:The probe MCPC showed remarkable changes with a “turn-off” fluorogenic sensing approach for the monitoring of Cu2+ at 456 nm under an excitation wavelength of 366 nm.

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Conclusion & Impact:The proposed sensing method was also verified by ICP-OES method.

🔬Design:Research Article

📍Scope:Comprehensive Sample

⚙️Variables:Coumarin · fluorescent sensor · copper

Abstract

A fluorogenic probe based on a coumarin-derivative for Cu2+ sensing in CH3 CN/H2 O media (v/v, 95/5, 5.0 μM) was developed and applied in real samples. 3-(4-chlorophenyl)-6,7-dihydroxy-coumarin (MCPC) probe was obtained by synthetic methodologies and identified by spectral techniques. The probe MCPC showed remarkable changes with a “turn-off” fluorogenic sensing approach for the monitoring of Cu2+ at 456 nm under an excitation wavelength of 366 nm. The response time of the probe MCPC was founded as only 1 min. The detection limit of the probe MCPC was recorded to be 1.47 nM. The binding constant and possible stoichiometric ratio (1:1) values were determined by Benesi-Hildebrand and Job’s plot systems, respectively. The mechanism of the probe MCPC with Cu2+ was further confirmed by ESI-MS and FT-IR analyses, as well as supported by theoretical calculations. Furthermore, the probe MCPC was successfully employed for the practical applications to sense Cu2+ in different herbal and black tea samples. The proposed sensing method was also verified by ICP-OES method.

Keywords

Coumarin fluorescent sensor copper DFT tea samples

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Cite This Article

SAVRAN, T., KARAGOZ, A., ELMAS, S. N. K., AYDİN, D., OZEN, F., KORAN, K., ARSLAN, F. N., GORGULU, A. O., YİLMAZ, I. (2020). Fluorescent sensing platform for low-cost detection of Cu2+ by coumarin derivative: DFT calculation and practical application in herbal and black tea samples. Turkish Journal of Chemistry, Cilt: 44 - Sayı: 4, 1148–1163. https://ajindex.com/articles/217969

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