Abstract
In this study describes the fluorescein methacrylate (FMA) used as fluorescence functional monomer in the synthesis of caffeine-imprinted fluorescence polymers (Caf-FMIP) for the selective recognition of caffeine. The Caf-FMIP was synthesized using bulk polymerization with non-covalent imprinting approach and the formation of ˗NH groups had interaction with caffeine and FMA moieties was confirmed by using Fourier transform infrared spectroscopy (FT-IR). The absorption isotherm analysis of Caf-FMIP favors Freundlich model suggested the forming heterogeneous surface was occurred due to non-covalent imprinting approach. Fluorescence emissions of synthesized Caf-FMIP were ‘switched on’ in the presence of target molecule based on photo-induce electron transfer (PET) mechanism. In addition, Caf-FMIP fluorescence was enhanced more strongly by caffeine compared to non-imprinted polymer, which indicated that caffeine could recognized by the Caf-FMIP selectively.
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