喹喔啉
荧光
噻吩
转身(生物化学)
化学
钠
离子
钠盐
光化学
组合化学
无机化学
生物化学
有机化学
量子力学
物理
作者
K.M. Divya,D.P. Savitha,G. Anjali Krishna,T.M. Dhanya,Pezholil Mohanan
标识
DOI:10.1016/j.jphotochem.2022.114046
摘要
• Thiophene based pyrrolo [1, 2-a] quinoxalline sensor from thiophene 2-carboxaldehyde and 1-(2-amino phenyl) pyrrole. • Fluorescent detection of sodium ions by turn-off mechanism. • Sensor offers excellent selectivity towards sodium ions in competitive environment. • The proposed sensor offers nanomolar detection of sodium ions with a detection limit of 2.219 nM. • Effective fluorescent sensor for biological and environmental applications. • Computational studies were carried out to validate the experimental results. A novel thiophene based pyrrolo [1, 2-a] quinoxaline (TAAPP) fluorescent sensor, suitable for the nanomolar detection of sodium ions was successfully developed and characterized by various spectroscopic techniques. The fluorescent sensor showed excellent selectivity for sodium ions over other biologically and environmentally important metal ions/biomolecules by a remarkable quenching of fluorescence. Stern-Volmer studies reveal that static quenching predominates over dynamic quenching. The detection limit was found to be 2.219 nM within the linear range of 3 to 30 nM. DFT studies were performed to validate the results. The applicability of the probe can be extended to quantify sodium ions in real samples.
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