超细荧光聚合物纳米微球的制备

Preparation of Fluorescent Ultrafine Polymer Nanoparticles

合成了具有较高荧光量子产率(0.69)和良好光稳定性的可聚合荧光染料单体,该荧光染料的光稳定性高于商品化的染料罗丹明B。通过氧化还原引发剂引发乳液聚合制备了超细荧光聚合物纳米微球,将染料分子共价连接在聚合物链上。使用非离子表面活性剂Triton X-100作为乳化剂、甲基丙烯酸甲酯(MMA)作为单体和助乳化剂,制备的超细纳米微球平均粒径为22 nm,而不加MMA时制备出的纳米微球平均粒径在150 nm左右。由于微球表面带有苄氯基团,为进一步的微球功能化提供了途径。

A new polymerizable fluorescent dye with high fluorescence quantum yield （0. 69 ） was synthesized. The dye possesses even better photo stability than commercial dye Rhodamine B. The fluorescent uhrafine polymer nanoparticles were obtained by emulsion polymerization initialized by redox initiator. The average diameter of the nanoparticles prepared by Triton X-100 as emulsifier and methyl methacrylate（MMA） as assistant emulsifier and monomer is 22 nm, while the diameter is about 150 nm without MMA. The benzyl chloride groups provide an easy way to further function.