中文摘要：

采用活性基团修饰法,通过罗丹明B酰肼（RhBH）与乙烯基吡咯烷酮-甲基丙烯酸缩水甘油酯共聚物（P（VP-co-GMA））侧链上环氧基团的开环反应,制得一种键合有罗丹明B酰肼的水溶性聚合物RhBH-P（VP-co-GMA）。在水溶液中,该聚合物本身无色且无荧光,加入汞离子后,罗丹明的螺环结构打开,出现显著的荧光增强和颜色变红,实现了在水溶液中对汞离子的＂关-开＂荧光检测和裸眼检测。在此条件下,其他共存离子没有明显响应。研究表明：该聚合物是一种高选择性的Hg2＋探针,可以实现水溶液中的汞离子检测。

英文摘要：

A novel water-soluble copolymer RhBH-P（VP-co-GMA） bearing rhodamine B hydrazine（RhBH） was prepared by ring-opening reaction between RhBH and a water-soluble copolymer P（VP-co-GMA） which was synthesized by radical polymerization of N-vinyl pyrolidone（VP） and glycidyl methacrylate（GMA）.Upon addition of Hg2＋,the spirocyclic ring of RhBH-P（VP-co-GMA） was opened and a significant fluorescence enhancement as well as colorimetric change was observed,which allowed to detect Hg2＋ in aqueous solution by both fluorescence technique and naked eye.In addition,the feeding of other transition metal ions has no interference,which shows RhBH-P（VP-co-GMA） is a highly selective macromolecular probe for detection of Hg2＋ in aqueous solution.