Research on the Langmuir-Blodgett Films of Rare Earth-β-diketone Complexes and Triplet Energy Transfer

Abstract

Abstract: The Langmuir-Blodgett (LB) technique was used for studying enhanced lumines-cence of Eu (TTA)₃ Phen (acceptor) by La (TTA)₃ Phen (donor).LBfilms studied here are:(1) [0.5% Eu (TTA)₃ Phen + 99.5% La (TTA)₃ Phen]: AA = 1: 1; (2) [0.5%Eu(TTA)₃ Phen+99.5%AA]: AA= 1: 1; (3) La(TTA)₃ Phen: AA= 1: 1.These filmscould form stable monolayers at air/water surface.The fluorescence intensity of LB 1 was 65times stronger than that of LB2.This signifies that the luminescence intensity ofEu(TTA)₃ Phen could be enhanced by La (TTA)₃ Phen clearly.Low angle X-ray diffrac-tog ram of LB1 showed that the film has a period layered structure.To study the intermolec-ular energy transfer, different structures of the multilayer were designed by combining LB2(layer of acceptor) with LB3(layer of donor).The results indicated that the intermolecularenergy transfer occurred in a short-range (<3 nm) and at the position of head-head in Y-typemodel.The influence of the interface on the energy transfer was prominent.The process ofenergy transfer was carried out via the triplet state of TTA.

Key words: Rare-earth complex, LB film, Fluorescence, Triplet energy transfer

CLC Number:

O648.12

TrendMD:

ZHONG Guo-Lun, YANG Kong-Zhang, FENG Yu, ZHU Gui-Yun. Research on the Langmuir-Blodgett Films of Rare Earth-β-diketone Complexes and Triplet Energy Transfer[J]. Chem. J. Chinese Universities, 1997, 18(7): 1194.

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Research on the Langmuir-Blodgett Films of Rare Earth-β-diketone Complexes and Triplet Energy Transfer

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