物理化学学报 >> 1997, Vol. 13 >> Issue (06): 493-496.doi: 10.3866/PKU.WHXB19970604

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LB膜中稀土配合物分子间能量转移研究

钟国伦,杨孔章   

  1. 山东大学胶体与界面化学研究所，济南 250100
  • 收稿日期:1997-03-03 修回日期:1997-04-23 发布日期:1997-06-15
  • 通讯作者: 杨孔章

Research on the Intermolecular Energy Transfer of Rare Earth Complexes in Langmuir-Blodgett Films

Zhong Guo-Lun,Yang Kong-Zhang   

  1. Institute of Colloid and Interface Chemistry,Shandong University,Jinan 250100
  • Received:1997-03-03 Revised:1997-04-23 Published:1997-06-15
  • Contact: Yang Kong-Zhang

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关键词: LB膜, 稀土, 配合物, 能量转移, 活性增强球

Abstract:

To study intermolecular energy transfer of rare earth-β-diketones, monolayers of mixed RE(TTA)3Phen (RE=La, Gd, Tb, or Y) with Eu(TTA)3Phen in molar ratio of 1:1 and 1:4 were fabricated in this paper. Meanwhile, an active enhanced sphere model was proposed to acquire the efficient radii of energy transfer between the molecules of complexes. The efficient radius for energy transfer from Gd(TTA)3Phen or Tb(TTA)3Phen to Eu(TTA)3Phen is 12Å and those from La (TTA)3Phen and Y(TTA)3Phen to Eu(TTA)3Phen are 7Å and 10Å, respectively. The reliability of the model was proved by comparing the emission intensities that were calculated by using values of R mentioned above with experimental values. The model proposed is a supplement to Perrins active sphere theory. By this model a triplet-triplct energy transfer can be deduced from TTA of RE(TTA)3Phen to that of Eu(TTA)3Phen. The process proceeds by an electron exchange mechanism.

Key words: LB films, Rare earth, Complex, Energy transfer, Active enhanced sphere