pH敏感的荧光聚合物的合成及性能研究

Studies on synthesis and properties of pH sensitive fluorescent polymers

设计合成了一种新的乙烯基荧光功能单体邻(2-甲基)丙烯酰氧基-苯甲醛缩氨基硫脲(ScMA),经1H NMR(核磁共振氢谱)证实了它的结构和组成。并用此单体与N-乙烯基吡咯烷酮(NVP)通过自由基聚合制备了荧光共聚物PVP-ScMAⅠ、PVP-ScMAⅡ和PVP-ScMAⅢ。实验结果表明,在碱性条件下,聚合物的荧光强度对pH的变化非常敏感;而在中性及酸性条件下。

A novel fluorescent functional monomer （2-methacryloxy） phenyl aldehyde thiosemicarbazone （ScMA） was synthesized and copolymerized with N-vinylpyrrolidone （NVP） to get a series of fluorescent copolymers （PVP-ScMA Ⅰ ,PVP-ScMA Ⅱ and PVP-ScMAⅢ ）. 1H NMR was used to characterize this monomer. Results of fluorescence measurements showed that the fluorescent intensities of these copolymers were very sensitive to the changes of pH in the condition of alkali and there were almost no response to the changes of pH in the neutral and acidic circumstance.