Influence of the synthesis parameters on the efficiency of fluorescent ion-imprinted polymers for lead detection

Autor: William René, Véronique Lenoble, Katri Laatikainen, Bruno Viguier, Catherine Branger
Přispěvatelé: Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Lappeenranta-Lahti University of Technology, Laboratoire Matériaux Polymères Interfaces Environnement Marin - EA 4323 (MAPIEM), Université de Toulon (UTLN)
Rok vydání: 2022
Předmět:
Zdroj: Reactive and Functional Polymers
Reactive and Functional Polymers, 2022, 170, pp.105134. ⟨10.1016/j.reactfunctpolym.2021.105134⟩
ISSN: 1381-5148
DOI: 10.1016/j.reactfunctpolym.2021.105134
Popis: International audience; New fluorescent ion-imprinted polymers (IIPs) specific for Pb(II) detection were synthesized by precipitation polymerization. The fluorescent activity of the IIPs was provided by a fluorescent functional monomer, ANQ-ST, based on the chelating 5-amino-8-hydroxyquinoline moiety coupled to anthracene and to a styrenic group. Various synthesis parameters were tested: metal/functional monomer ratio, polymerization solvent and crosslinker (ethyleneglycol dimethacrylate, EGDMA, or divinylbenzene, DVB). The characterization of the different IIPs was carried out by solid-state 13 C NMR spectroscopy, to analyse the structure of the polymers and to attest the integration of the ANQ-ST in the polymer matrix, and by scanning electron microscopy and nitrogen adsorption/desorption experiments, to study the morphology of the prepared materials. After characterization, the IIPs and their corresponding non-imprinted polymer (NIPs) were subjected to various fluorescence studies, in order to conclude on the influence of the synthesis parameters onto the polymer properties. The results demonstrated that the IIP synthesized with a metal/functional monomer ratio of 0.42 in DMSO/MeOH (1:1, v/v) and using EGDMA as a crosslinker was very sensitive to the presence of Pb(II) ions and almost not to that of the other tested ions (Ag(I), Na(I), Ca(II), Cd(II), Co(II), Cu(II) and Zn(II)), even when they were introduced in high excess. Calibration curves were performed in various matrices: ultra-pure water, buffered water at pH 7.0 and 8.1, seawater, tap water. They highlighted the low impact of the tested matrices onto the detection and allowed to determine a limit of detection of 2.4 µg/L and a linear range of 8.0-50 µg/L. Finally, the very good recovery obtained in natural samples emphasized the potential for the synthesized IIP to detect Pb(II) in natural waters.
Databáze: OpenAIRE
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