用偶氮二异丁腈作引发剂，使Ｎ－乙烯基咔唑和丙烯酸甲酯在苯中共聚合，该共聚物在四氢呋喃中用氢氧化钠水溶液水解，得到水溶性乙烯基咔唑－丙烯酸共聚物。该共聚物的水溶液在３７３ｎｍ处产生较强的荧光，其荧光强度随溶液ｐＨ值增大而增强，在该高分子水溶液中，加入少量阳离子表面活性剂，其量子产率可提高７倍，微量重金属离子（Ｈｇ（２＋））对荧光有一定的熄灭作用。荧光强度（ｌｏｇＩ０／Ｉ）与Ｈｇ（２＋）的浓度呈线性关系。 N-vinylcarbazole and methyl acrylate were copolymerized in benzene using azobisisobutyronitrile as an initiator, and the copolymer was hydrolyzed in an aqueous sodium hydroxide solution in tetrahydrofuran to obtain a water-soluble vinylcarbazole-acrylic acid copolymer Things. The aqueous solution of this copolymer produced strong fluorescence at 373nm, its fluorescence intensity increased with the increase of the pH of the solution. Adding a small amount of cationic surfactant in the aqueous polymer solution could increase the quantum yield by 7 times. The trace amount Heavy metal ions (Hg (2+)) have a certain extinguishing effect on the fluorescence. The fluorescence intensity (logI0 / I) was linear with the concentration of Hg (2+).