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

doi:10.7503/cjcu20120533

Abstract

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

CLC Number:

O631

TrendMD:

ZHOU Ying-Jie, ZHU Hai-E, ZHANG Jun, WU Shui-Lin, YI Chang-Feng, XU Zu-Shun. Preparation and Micellization Behavior of Europium-containing Fluorescent Amphiphilic Graft Copolymer[J]. Chem. J. Chinese Universities, 2013, 34(3): 732.

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

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