Abstract
l-Phenylalanine imprinted polymeric adsorbent was fabricated by a non-covalent approach utilizing methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker, acetonitrile as porogen, and acetic acid and trifluoroacetic acid as additives (template:monomer:cross-linker ratio was 1:5:24). Adsorption equilibrium, kinetic, thermodynamic, and enantioselective studies were carried out characterization of adsorbent. Parallel studies were performed for the binding of enantiomers on non-imprinted polymer. The experimental l- and d-phenylalanine adsorption-binding isotherms were fitted with hybrid Langmuir–Freundlich model. Studies have demonstrated a heterogeneous distribution of binding sites, site with high and low binding affinity, in polymer. The thermodynamic test revealed the entropy controlled adsorption process on l-phenylalanine imprinted adsorbent. Kinetic studies indicated second-order rate adsorption process. The adsorbent is characterized by enantioselectivity for recognition of phenylalanine enantiomers.
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Acknowledgements
This research was supported by the Scientific Grant Agency VEGA of the Slovak Republic under Grant number 1/0159/20). Authors thanks to Assoc. prof. J. Sádecká, PhD. for realization spectrofluorescence measurements.
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Hroboňová, K., Vybohová, V., Lomenova, A. et al. Characterization of kinetic, thermodynamic, and binding properties of l-phenylalanine molecularly imprinted polymer. Monatsh Chem 153, 1037–1047 (2022). https://doi.org/10.1007/s00706-022-02900-4
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DOI: https://doi.org/10.1007/s00706-022-02900-4