TY  - JOUR
N1  - The copyright of this article belongs to ACS Publications 
ID  - open2994
UR  - https://pubs.acs.org/doi/10.1021/acsomega.1c07193
IS  - 13
A1  - Sasan, Sonakshi 
A1  - Chopra, Tavishi 
A1  - Gupta, Annah 
A1  - Tsering, Dolma 
A1  - Kapoor, Kamal K
A1  - Parkesh, Raman 
Y1  - 2022/03/22/
N2  - 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.
PB  - ACS Publications 
JF  - ACS Omega
VL  - 7
TI  - Fluorescence ?Turn-Off? and Colorimetric Sensor for Fe2+, Fe3+, and Cu2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold
SP  - 11114
EP  - 11125
ER  -