An Efficient Fluorescent Chemosensing Probe for Total Determination and Speciation of Ultra-Trace Levels of Mercury (II) Species in Water.

Autor: Alwael H; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia., Alzahrani KA; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, 21589, Saudi Arabia., Abduljabbar TN; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia., Alharthi AS; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.; Department of Chemistry, Faculty of Applied Sciences, Umm AL-Qura University, Makkah, Saudi Arabia., Alshareef FM; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia., Bahaidarah EA; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia., Alkhraije AA; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.; Department of Chemistry, Al-Leith University College, Umm AL-Qura University, Al Leith Makkah, Al-Leith, Saudi Arabia., El-Shahawi MS; Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia. mohammad_el_shahawi@yahoo.co.uk.; Department of Chemistry, Faculty of Science, Damietta University, New Damietta, Damietta, Egypt. mohammad_el_shahawi@yahoo.co.uk.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2024 Nov 01. Date of Electronic Publication: 2024 Nov 01.
DOI: 10.1007/s10895-024-03999-w
Abstrakt: The current study reports a novel fluorescent chemosensor based on the tagging agent 4,5,6,7-tetrachloro-2',4',5',7'-tetraiodofluorescein (Rose Bengal, RB) for detection of trace levels of Hg 2+ in environmental water. The established probe has been based upon liquid-liquid extraction (LLE) of the developed ternary complex ion associate {[Hg (bpy) 2 ] 2+ .[RB] 2- } of Hg 2+ -2,2- bipyridyl complex [Hg (bpy) 2 ] 2+ and RB at pH 9.0 onto chloroform and measuring the resulting fluorescence enhancement signal intensity at λ ex/em  = 570/ (580-600) nm. The limits of detection (LOD) and quantification (LOQ) of for Hg 2+ was calculated to be 6.06 and 20 nM with a linear dynamic range (LDR) of 0.02-20µM, respectively. The stability constant, stoichiometry, chemical equilibria, and the thermodynamic parameters (ΔH, ΔS, and ΔG) of the developed ion associate were evaluated and assigned. Student's t and F tests at 95% confidence were fruitfully used for validation of the proposed methodology for Hg 2+ detection in water samples with the aid of inductively coupled plasma-optical emission spectrometry (ICP-OES). The established strategy was successfully applied for detection of trace levels of Hg 2+ in water samples with acceptable results. The proposed probe was satisfactorily applied for total determination and speciation of Hg in various water samples. Integrating the functional chelating agent onto associate formation to improve the selectivity and sensing properties of the LLE combining sensing probe towards target analyte in water represent the main interest.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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