离子
荧光
检出限
水溶液中的金属离子
分析化学(期刊)
化学
水溶液
材料科学
物理化学
色谱法
物理
光学
有机化学
作者
Sonakshi Sasan,Tavishi Chopra,Annah Gupta,Dolma Tsering,Kamal K. Kapoor,Raman Parkesh
出处
期刊:ACS omega
[American Chemical Society]
日期:2022-03-22
卷期号:7 (13): 11114-11125
被引量:32
标识
DOI:10.1021/acsomega.1c07193
摘要
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.
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