含铕荧光两亲接枝共聚物的制备及胶束化行为  

Preparation and Micellization Behavior of Europium-containing Fluorescent Amphiphilic Graft Copolymer

作　　者：周英杰[1] 朱海娥[1] 张俊[2] 吴水林[1,3] 易昌凤[1,3] 徐祖顺[1,3] 

机构地区：[1]湖北大学材料科学与工程学院,武汉430062 [2]湖北大学生命科学学院,武汉430062 [3]湖北大学功能材料绿色制备与应用教育部重点实验室,武汉430062

出　　处：《高等学校化学学报》2013年第3期732-738,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50973027);教育部博士点基金(批准号:20094208110002)资助

摘　　要：以丙烯酸(AA)、苯甲酸(BA)和邻菲啰啉(Phen)为配体,Eu3+为中心离子,制备了可聚合荧光配合物单体,并以此单体为功能单体,聚乙二醇单甲醚甲基丙烯酸酯(MPEGMA)和甲基丙烯酸六氟丁酯(HFMA)为共聚单体,通过溶液聚合制备出含铕两亲荧光接枝共聚物P[HFMA-co-Eu(AA)(BA)2Phen]-g-PEG.利用红外光谱(FTIR)和核磁共振波谱(1H NMR和19F NMR)对共聚物的结构进行表征;采用表面张力法测定共聚物的临界胶束浓度(cmc)为0.20 g/L;通过透射电子显微镜(TEM)和动态光散射仪(DLS)观察胶束的形貌及其胶束化行为,发现该共聚物可以形成大小均一的球形胶束,且随着共聚物浓度的提高,胶束粒径相应增大;在溶液浓度达到临界胶束浓度时,溶液荧光出现强度突变.A new polymerizable fluorescent complex Eu（AA）（BA）2Phen was synthesized with Eu3＋,acrylic cid（AA）,benzoic acid（BA） and 1,10-phenanthroline（Phen）.The chemical structure and property were characterized by element analysis,FTIR and fluorescence spectroscopy.Afterwards,an Eu-containing amphiphilic graft copolymer P-g-PEG was synthesized by graft copolymerization of poly（ethylene glycol） methyl ether methacrylate（MPEGMA） macromonomer with 2,2,3,4,4,4-hexafluorobutyl methacrylate（HFMA） and Eu（AA）（BA）2Phen.The chemical structure of the functional copolymer was characterized by FTIR,1H NMR and 19F NMR.The critical micelle concentration（cmc） of the copolymer was measured by surface tension technique,indicating that the amphiphilic copolymer could form micelles in aqueous solution.Transmission electron microscopy（TEM） and dynamic light scattering（DLS） were used to investigate the morphology and micellization behavior of the micelles,and the images showed that the copolymer could self-assemble into spherical micelles.The size and distribution of the micelles both increased with the concentration of copolymer.In addition,the copolymer aqueous solution were characterized by fluorescence spectroscopy,and the results showed that the copolymer aqueous solution had a superior fluorescence property.When the solution concentration reached the cmc,fluorescence intensity increased greatly due to micellization and its hydrophobic core,and the result suggested that the cmc could be determined through the abrupt change of fluorescence intensity.

关 键 词：含氟聚合物 两亲接枝共聚物 胶束化行为 荧光 稀土 铕 

分 类 号：O631[理学—高分子化学]