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Fluorescence “Turn-Off” and Colorimetric Sensor for Fe2+, Fe3+, and Cu2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold

DIR@IMTECH: CSIR-Institute of Microbial Technology

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Title Fluorescence “Turn-Off” and Colorimetric Sensor for Fe2+, Fe3+, and Cu2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold
 
Creator Sasan, Sonakshi
Chopra, Tavishi
Gupta, Annah
Tsering, Dolma
Kapoor, Kamal K
Parkesh, Raman
 
Subject QR Microbiology
 
Description Two cyanoimidazopyridine-based sensors (SS1 and SS2) were explored for the colorimetric and fluorometric detection of Fe2+, Fe3+, and Cu2+ 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 Cu2+ ions in a 1:1 ratio and Fe2+/3+ ions in a 2:1 ratio, respectively. The sensors were found to have high binding constant (Ka) 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 Fe2+, Fe3+, and Cu2+ ions.
 
Publisher ACS Publications
 
Date 2022-03-22
 
Type Article
PeerReviewed
 
Relation https://pubs.acs.org/doi/10.1021/acsomega.1c07193
http://crdd.osdd.net/open/2994/
 
Identifier Sasan, Sonakshi and Chopra, Tavishi and Gupta, Annah and Tsering, Dolma and Kapoor, Kamal K and Parkesh, Raman (2022) Fluorescence “Turn-Off” and Colorimetric Sensor for Fe2+, Fe3+, and Cu2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold. ACS Omega, 7 (13). pp. 11114-11125.