Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (8): 1533.

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Luminescence Behavior on the Formation Complex of Water Soluble Calixarene Derivative with Earth Terbium(Ⅲ) Ion

ZHANG Ning, ZHAO Bang-Tun, LIU Yu   

  1. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-07-04 Online:2002-08-24 Published:2002-08-24

Abstract: The luminescent behavior on formation 1:1 complex of 25, 26, 27, 28 tetra carboxylic acid 5, 11, 17, 23 calixarenesulfonate(L2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed that the pHvalue of the solution had obviousan influence on the fluorescence intensity of L2·Tb3+ complex, but the fluorescence intensity was hardly changed over the pHrange from 6 to 11. The complex exhibits a higher emission quantum yield (φ =0.31) in aqueous solution, which indicates energy transfer type emission. The complexation behavior of L2 with trivalent lanthanoid ions(Tb3+ and Eu3+) was also studied in aqueous boracic acid(hydrochloric acid buffer solution(pH8.0) at 25 ℃ by UV-Vis and fluorescence measurements. The spectrophotometric titrations have been performed to give the complex stability constants (KS) for the stoichiometric 1:1 inclusion complexation of L2 with Tb3+ and Eu3+. The complex stability for L2·Eu3+ was higher than that for L2·Tb3+, but no characteristic fluorescence was found.

Key words: Water soluble calixarene, Terbium complex, Energy transfer, Fluorescence property

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