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Highly photoluminescent Eu(III) complexes of the new 1-triphenylen-2-yl-3-trifluoroacetylacetone

Paper ID Volume ID Publish Year Pages File Format Full-Text
27867 44047 2012 7 PDF Available
Title
Highly photoluminescent Eu(III) complexes of the new 1-triphenylen-2-yl-3-trifluoroacetylacetone
Abstract

The new triphenylene 1,3-diketone (1-triphenylen-2-yl-3-trifluoroacetylacetone (TphTA)) and its europium complexes were synthesized. The preliminary data on photophysical properties of Eu(TphTA)3(H2O)(C2H5OH) (1), Eu(TphTA)3(TOPO)(H2O) (2), Eu(TphTA)3(TOPO)2 (3) and Eu(TphTA)2NO3(TOPO)2 (4) are reported. Addition of a tri-n-octylphosphine oxide (TOPO) co-ligand to the europium diketonate complex removes water molecules from the coordination sphere, that leads to a significant increase of the photoluminescence quantum yield. The behavior of complexes 3 and 4 in nematic liquid crystal was investigated.

Graphical abstractTernary Eu(III) complex involving two 1,3-diketonate ligands, nitrate anion and two tri-n-octyl phosphinoxide co-ligands, and its photoluminescence spectrum.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Tri-n-octylphosphine oxide as auxiliary ligand enhances the photoluminescence quantum yield 3-, 6-fold of the Eu(III) complex. ► The orientation of triphenylene unit is parallel to the long axis of the nematic phase. ► Nematic phases appended with Eu(III) complexes are luminescent.

Keywords
Europium complexes; Triphenylene; 1,3-Diketonate; Luminescence; Quantum yield; Liquid crystals
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Highly photoluminescent Eu(III) complexes of the new 1-triphenylen-2-yl-3-trifluoroacetylacetone
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 250, 15 December 2012, Pages 85–91
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
Any Questions? feel free to contact us