Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (01): 223-231.doi: 10.3866/PKU.WHXB201111171

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Structure and Florescence Emission Properties of a Polymer-Rare Earth Complex Composed of Aryl Carboxylic Acid-Functionalized Polysulfone and Tb(III)

ZHANG Rui-Xia, GAO Bao-Jiao, WEI Xiao-Peng   

  1. Department of Chemical Engineering, North University of China, Taiyuan 030051, P. R. China
  • Received:2011-10-09 Revised:2011-11-14 Published:2011-12-29
  • Contact: GAO Bao-Jiao
  • Supported by:

    The project was supported by the Natural Science Foundation of Shanxi Province, China (201002100843).

Abstract: Benzoic acid (BA) was bonded to the side chains of polysulfone (PSF) via a polymer reaction, giving aryl carboxylic acid-functionalized polysulfone (PSFBA). The binary complex PSFBA-Tb(III) and ternary complex PSFBA-Tb(III)-phenanthroline (Phen) were prepared by the coordination of Tb(III) to PSFBA using PSFBA as a macromolecular ligand and Phen as a smaller ligand. The chemical structures of the complexes were characterized by Fourier transform infrared (FTIR) and UV absorption spectroscopies. The relationships between the structure and properties, including the fluorescence emission properties, of the complexes in solution and films were investigated, as well as their thermal stability. All of the polymerrare earth complexes containing PSFBA exhibited very strong characteristic fluorescence emission from Tb(III), namely, BA bonded to the side chains of PSFBA can effectively sensitize Tb(III). The apparent saturated coordination number of PSFBA-Tb(III) is 10, which implies that the coordination of BA to Tb(III) reaches saturation and maximum fluorescence is achieved for the complex PSF-(BA)5-Tb(III). The ternary complex PSF-(BA)5-Tb(III)-(Phen)1, which is prepared by adding Phen to a solution of PSF-(BA)5-Tb(III), possesses the strongest fluorescence emission and excellent thermal stability compared with ternary complexes PSF-(BA)1-Tb(III)-(Phen)3 and PSF-(BA)1-Tb(III)-(Phen)2, which were prepared using the conventional ratios of reagents.

Key words: Polysulfone, Benzoic acid, Polymer-rare earth complex, Sensibilization, Photoluminescence


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