Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (3): 732.doi: 10.7503/cjcu20120533

• Polymer Chemistry • Previous Articles     Next Articles

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

ZHOU Ying-Jie1, ZHU Hai-E1, ZHANG Jun3, WU Shui-Lin1,2, YI Chang-Feng1,2, XU Zu-Shun1,2   

  1. 1. College of Materials Science and Engineering, Hubei University, Wuhan 430062, China;
    2. Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China;
    3. College of Life Sciences, Hubei University, Wuhan 430062, China
  • Received:2012-06-04 Online:2013-03-10 Published:2013-02-18

Abstract:

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[HFMA-co-Eu(AA)(BA)2Phen]-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.

Key words: Fluoropolymer, Amphiphilic graft copolymer, Micellization, Luminescence, Rare earth, Europium

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