Devi Bhaswati, Guha Ankur Kanti, Devi Arundhuti
Environmental Chemistry Laboratory, Resource Management and Environmental Section, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam 781035, India; Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India.
Department of Chemistry, Cotton University, Guwahati, Assam 781001, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Jan 15;305:123448. doi: 10.1016/j.saa.2023.123448. Epub 2023 Sep 22.
The work described is focused on a newly developed colorimetric Schiff base fluorescent sensor that exhibits a "turn-off" response when detecting fluoride ions (F) in an aqueous environment. The confirmation of the recognition event is accomplished through fluorescence titration, absorbance titration, and Density Functional Theory (DFT) calculation study. From the results, it is determined that the detection limit of F is 2.35 × 10 M which is much lower than the World Health Organization (WHO) permissible limit for drinking water while the binding constant was obtained to be 0.1 × 10 M indicating a moderate affinity for the fluoride ions. Furthermore, the binding stoichiometry between the Probe L and F was found to be 1:1 which is evidenced by the Job's plot and DFT calculation study. Overall, the novel sensor's impressive sensitivity and selectivity make it a promising candidate for the detection of fluoride ions in aqueous media, particularly for monitoring drinking water quality to ensure compliance with WHO guidelines.
所描述的工作聚焦于一种新开发的比色席夫碱荧光传感器，该传感器在水环境中检测氟离子（F⁻）时表现出“关闭”响应。通过荧光滴定、吸光度滴定和密度泛函理论（DFT）计算研究完成了识别事件的确认。从结果可知，F⁻的检测限为2.35×10⁻⁶ M，远低于世界卫生组织（WHO）规定的饮用水允许限量，而结合常数为0.1×10⁻⁶ M，表明对氟离子具有中等亲和力。此外，通过乔布氏图和DFT计算研究证明，探针L与F⁻之间的结合化学计量比为1:1。总体而言，这种新型传感器令人印象深刻的灵敏度和选择性使其成为检测水介质中氟离子的有前途的候选者，特别是用于监测饮用水质量以确保符合WHO指南。
