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Photo-polymers Containing (S)-Phenylalanine and Stilbene Pendants: Synthesis and Properties of Ionic Polyacrylates

Radical co-polymerization of N-acryloyl-(S)-phenylalanine benzyl ester with N,N-dimethylaminoethyl acrylate using microwave-assisted rapid synthesis led to a co-polymer to be subsequently quaternized with 4-chloromethylphenylcarbamoyloxy-methylstilbene. 1H-NMR spectroscopy was employed to determine the molar ratio of monomeric units (1:5.6) and the content of fluorophore (0.15 molar fraction) from the co-polymer. Also, the photophysical properties of the photo-polymer including the fluorescence response toward some amines in DMF solution have been investigated. The effect of monomethyl viologene, 4,4′-bipyridyl, 2,2′-bipyridyl, piperazine and triethylamine, used as quenchers of stilbene fluorescence from co-polymer, was compared with that of ferrocene.