Fluorescence "Turn-Off" and Colorimetric Sensor for Fe 2+ , Fe 3+ , and Cu 2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold.

Autor: Sasan S; Department of Chemistry, University of Jammu, Jammu 180006, India., Chopra T; CSIR-Institute of Microbial Technology, Chandigarh 160036, India., Gupta A; Department of Chemistry, University of Jammu, Jammu 180006, India., Tsering D; Department of Chemistry, University of Jammu, Jammu 180006, India., Kapoor KK; Department of Chemistry, University of Jammu, Jammu 180006, India., Parkesh R; CSIR-Institute of Microbial Technology, Chandigarh 160036, India.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2022 Mar 22; Vol. 7 (13), pp. 11114-11125. Date of Electronic Publication: 2022 Mar 22 (Print Publication: 2022).
DOI: 10.1021/acsomega.1c07193
Abstrakt: Two cyanoimidazopyridine-based sensors (SS1 and SS2) were explored for the colorimetric and fluorometric detection of Fe 2+ , Fe 3+ , and Cu 2+ ions in the semi-aqueous medium. The "turn-off" fluorescence response of both sensors to these ions was due to the restriction in internal charge transfer. Job's plot and semi-empirical calculations revealed that SS1 and SS2 complexed with Cu 2+ ions in a 1:1 ratio and Fe 2+/3+ ions in a 2:1 ratio, respectively. The sensors were found to have high binding constant ( K a ) values and low detection limit values. FMO analysis using the semi-empirical quantum mechanics method revealed the decrease in energy gap after complexation with metal ions. Sensor-coated filter paper strips were prepared and analyzed, where the color changes in the strips could be utilized for the real-time detection of Fe 2+ , Fe 3+ , and Cu 2+ ions.
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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