摘要
The luminescent behavior on formation 1∶1 complex of 25,26,27,28 tetra carboxylic acid 5,11,17,23 calixarenesulfonate(L 2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed that the pH value of the solution had obviousan influence on the fluorescence intensity of L 2·Tb 3+ complex, but the fluorescence intensity was hardly changed over the pH range 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 L 2 with trivalent lanthanoid ions(Tb 3+ and Eu 3+ ) was also studied in aqueous boracic acid(hydrochloric acid buffer solution(pH 8.0) at 25 ℃ by UV Vis and fluorescence measurements. The spectrophotometric titrations have been performed to give the complex stability constants( K S) for the stoichiometric 1∶1 inclusion complexation of L 2 with Tb 3+ and Eu 3+ . The complex stability for L 2·Eu 3+ was higher than that for L 2·Tb 3+ , but no characteristic fluorescence was found.
The luminescent behavior on formation 1∶1 complex of 25,26,27,28 tetra carboxylic acid 5,11,17,23 calixarenesulfonate(L 2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed that the pH value of the solution had obviousan influence on the fluorescence intensity of L 2·Tb 3+ complex, but the fluorescence intensity was hardly changed over the pH range 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 L 2 with trivalent lanthanoid ions(Tb 3+ and Eu 3+ ) was also studied in aqueous boracic acid(hydrochloric acid buffer solution(pH 8.0) at 25 ℃ by UV Vis and fluorescence measurements. The spectrophotometric titrations have been performed to give the complex stability constants( K S) for the stoichiometric 1∶1 inclusion complexation of L 2 with Tb 3+ and Eu 3+ . The complex stability for L 2·Eu 3+ was higher than that for L 2·Tb 3+ , but no characteristic fluorescence was found.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第8期1533-1535,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金 (批准号 :2 9992 5 90 -82 9972 0 2 9)资助
