Abstract
A monomer 7-hydroxy-4-methyl-8-(4′-allyloxypiperazin-1′-yl) methylcoumarin with blue fluorescence was synthesized. The present investigation dealt with the synthesis and characterization of a coumarin monomer, containing a piperazine group. Then it was copolymerized with N-vinylpyrrolidone to obtain a water-soluble fluorescent copolymer (poly(Al-HMPC-co-VP)). The fluorescence characteristics of the polymer as a function of pH sensor were investigated in aqueous solution. It was found that the polymer displayed sensitive fluorescence signal amplification over a wide pH scale, which was ascribed to a photoinduced electron transfer from the piperazine receptor to the coumarin fluorophore. In addition, the influence of metal cations on the fluorescence intensity of poly(Al-HMPC-co-VP) were also studied. Obvious fluorescence enhancement was due to the photophysical response of the polymer to the presence of Ni2+ ion. The results suggest that copolymer may offer potential application as a reusable polymer for sensor protons and Ni2+ ion in aqueous solution.
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Wang, BY., Liu, XY., Ding, SL. et al. Synthesis and photophysical properties of a blue water-soluble fluorescent polymer for Ni2+ and proton sensing. J Polym Res 18, 1315–1322 (2011). https://doi.org/10.1007/s10965-010-9534-x
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DOI: https://doi.org/10.1007/s10965-010-9534-x