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Effects of synergetic ligands on structure and fluorescence properties of Langmuir and Langmuir–Blodgett films containing Eu(TTA)3nL

Paper ID Volume ID Publish Year Pages File Format Full-Text
28399 44074 2007 8 PDF Available
Title
Effects of synergetic ligands on structure and fluorescence properties of Langmuir and Langmuir–Blodgett films containing Eu(TTA)3nL
Abstract

Effects of synergetic ligands of the europium complexes Eu(TTA)3nL (Eu denotes the central ion Eu(III), TTA denotes the β-diketone ligand α-thenoyltrifluoroacetone, L denotes the synergetic ligands triophenylphosphine oxide, 1,10-phenanthroline, 2,2′-bipy and H2O, respectively) on fluorescence properties and supermolecular structures of Langmuir and Langmuir–Blodgett films were studied. Experiments on the Langmuir trough showed that different supermolecular structures were formed for each complex with different synergetic ligands, in which aggregate structure was found at the air/subphase interface for Eu(TTA)3Phen and multilayer structure for the other three complexes. This result is accordance with the R values calculated in terms of their fluorescence spectra. Fluorescence enhancement was found to be in an order of the relative emission intensity of the fluorescent LB films: I(Eu(TTA)3(TPPO)2) > I(Eu(TTA)3Phen) > I(Eu(TTA)3Bipy) > I(Eu(TTA)3·2H2O). Detailed analysis on the LB film containing Eu(TTA)3(TPPO)2 revealed that the LB film containing Eu(TTA)3(TPPO)2 not only have the strongest red light emit, the best monochromacity, good miscibility with arachidic acid (AA), but also have condensed structure, controllable nanometer-scale thickness and vertical uniformity.

Keywords
Fluorescence; Rare earth complex; Synergetic ligand; Langmuir–Blodgett film
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Effects of synergetic ligands on structure and fluorescence properties of Langmuir and Langmuir–Blodgett films containing Eu(TTA)3nL
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2–3, 20 May 2007, Pages 218–225
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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