Article 2025 · 2 citations

Unusual phenolphthalein-based fluorescent sensors for medium-selective multi-ions sensing in real samples

Hussein, Abdullah Saleh, Lafzi, Ferruh, Bayindir, Sinan, Toprak, Mahmut

Abstract

This study aimed to synthesize unusual phenolphthalein-based probes (PPs) and explore their photochemical properties. Synthesized PPs were investigated for their interactions with various ions in aqueous solutions using UV-Vis and fluorescence spectroscopy. PP1 exhibited turn-on fluorescence responses to Al3+, Cd2+, and Zn2+ ions at pH 7, while PP2 responded specifically to Zn2+ ions. Notably, pH-dependent selectivity was observed for PP1, with Al3+ and Zn2+ ions triggering turn-on responses at pH 5 and 9, respectively. Limit of detection (LOD) values and association constants (Ka) were determined for these interactions. Additionally, reversible on/off switching behavior was demonstrated for PP1/PP2 upon alternate addition of AlCl3/ZnCl2 and [Bu4N]OH. The effectiveness of PPs for real-world sample analysis was confirmed. Furthermore, the PP2-Cd2+ complex exhibited irreversible binding with cyanide and thiocyanide ions.

Keywords

Phenolphthalein Multi-ions sensing Aluminum Cadmium Zinc Turn-on pH selective sensing SEQUENTIAL DETECTION PROBE ALUMINUM ZN2+ CD2+ CONJUGATE AL3+

WoS Categories

Chemistry, Inorganic & Nuclear

Sustainable Development Goals

Good Health and Well-being

Citation

Journal: INORGANICA CHIMICA ACTA
Year: 2025
Volume: 581
ISSN: 0020-1693
eISSN: 1873-3255
DOI: 10.1016/j.ica.2025.122641
WoS UID: WOS:001446415800001

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