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.
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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.
| Item Type: | Article |
|---|---|
| Additional Information: | The copyright of this article belongs to ACS Publications |
| Subjects: | Q Science > QR Microbiology |
| Depositing User: | Dr. K.P.S.Sengar |
| Date Deposited: | 25 Jul 2022 06:14 |
| Last Modified: | 25 Jul 2022 06:14 |
| URI: | http://crdd.osdd.net/open/id/eprint/2994 |
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