高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (11): 1856.

• 研究论文 • 上一篇    下一篇

铕(Ⅲ)荧光增敏体系在微乳液中的发光性质和荧光衰减动力学研究

孙照勇, 艾希成, 冯娟, 张启元, 张兴康   

  1. 中国科学院化学研究所, 分子科学中心, 分子动态与稳态结构国家重点实验室, 北京 100080
  • 收稿日期:2000-06-06 出版日期:2001-11-24 发布日期:2001-11-24
  • 通讯作者: 孙照勇(1968年出生),男,博士,从事化学与生物凝聚相体系光诱导电子转移研究.E-mail:yt@xx1.icas.ac.cn E-mail:yt@xx1.icas.ac.cn
  • 基金资助:

    国家自然科学基金(批准号:39890390)资助

Studies on the Luminescence Properties and Decay Dynamics of Eu(Ⅲ) Enhanced Fluorescence Systems in Micelle Solutions

SUN Zhao-Yong, AI Xi-Cheng, FENG Juan, ZHANG Qi-Yuan, ZHANG Xing-Kang   

  1. State Key Laboratory of Structural Chemistryf or Unstable & Stable Species, Institute of Chemistry, The Chinese Academy of Sciences, Molecular Science Center, Beijing 100080, China
  • Received:2000-06-06 Online:2001-11-24 Published:2001-11-24

摘要: 利用稳态和瞬态光谱方法研究了不同铕离子发光体系中各种因素对铕离子发光性质的影响.通过吸收和激发光谱的变化分析了稀土离子Gd3+对Eu3+增敏机理,并从荧光衰减动力学角度证明了主配体噻吩甲酰三氟丙酮(TTA)、协配体邻啡咯啉(Phen)、稀土离子Gd3+和表面活性剂TX-100对铕离子发光的增敏作用.4种发光体系Eu3+/Gd3+/TTA/Phen/TX-100,Eu3+/TTA/Phen/TX-100,Eu3+/Gd3+/TTA/Phen和Eu3+/Gd3+/TTA/TX-100中铕离子5D0态的发光寿命依次为980>670>400>260μs,而且存在铕离子5D15D0的传能过程.在发光越强的体系中,5D1的衰减越慢,相应地5D0的上升时间也就越长.研究结果表明,在最佳发光体系中既存在分子内的能量转移,又存在分子间的能量传递.

关键词: 铕(Ⅲ), 稳态与瞬态光谱, 荧光增敏, 荧光寿命, 能量转移

Abstract: The influence factors of luminescent properties of Eu 3+ in-different aqueous systems and the fluorescence enhancementmechanism of Gd 3+ for Eu 3+ were studied by absorption and stable and transient fluorescence methods. The results of the fluorescence decay dynamics show that the first ligand(TTA), the second ligand(Phen), Gd 3+ and TX-100 can increase all the luminescence of Eu 3+. The lifetimes of 5-D-0 level of Eu 3+ in four systems are 980, 670, 400 and 260 μs, separately. Moreover, 5-D-1 level of Eu 3+ can transfer energy to 5-D-0 level.

Key words: Eu(Ⅲ), Stable and transient spectra, Fluorescence enhancement, Fluorescence lifetime, Energy transfer

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