A Novel Fluorescein Ligand Fluorescent Probe for Multi-Ion Detection
10 Pages Posted: 1 Aug 2023
Abstract
Using fluorescein and thiophene hydrazine, a new multi-ion detection fluorescent probe called YS was created in this study. It can detect Al3+ and Cu2+ by the fluorescence on and off phenomena, respectively. The binding ratio of YS to both Al3+ and Cu2+ was calculated by Job's plot as 1:1, and the binding constants of YS to Al3+ and Cu2+ were calculated by Benesi-Hildebrand method as 1.38×105 M-1 and 2.09×104 M-1, respectively. Finally, by examining the data from the fluorescence gradient concentration test, It can be observed that the fluorescence probe YS has high sensitivity and selectivity for both Al3+and Cu2+, with a minimum detection limit of at 12.65nM and 4.732nM, both of which are lower than the WHO standards for the corresponding ions in drinking water. The convenience detection test demonstrated that YS can achieve in situ rapid detection of Al3+ and the results are easy to observe and distinguish.
Keywords: Fluorescein;Thiophene hydrazine;Multi-ion detection;PET
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