Spectroscopic studies of an europium(III) tris-β-diketonate complex bearing a pyrazolylpyridine ligand

António Moreira dos Santos; Ana C. Coelho; Filipe A.Almeida Paz; João Rocha; Isabel S. Gonçalves; Luís D. Carlos

doi:10.1016/j.jallcom.2007.04.141

Spectroscopic studies of an europium(III) tris-β-diketonate complex bearing a pyrazolylpyridine ligand

António Moreira dos Santos, Ana C. Coelho, Filipe A.Almeida Paz, João Rocha, Isabel S. Gonçalves, Luís D. Carlos

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A new europium(III) complex, Eu(BTA)₃(ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate) (where BTA: 1-benzoyl-3,3,3-trifluoroacetonate), was synthesised by simple ligand exchange with the solvent adduct Eu(BTA)₃(H₂O)₂. The compound was characterised by elemental analysis, thermogravimetry, FTIR, FT Raman and photoluminescence spectroscopies. A significant increase of the ⁵D₀ lifetime of the complex, relative to the value found for the water-coordinated adduct (from 0.657 ± 0.001 to 0.835 ± 0.002 ms), and a larger contribution of the ligand levels to the excitation spectrum indicate a better photoluminescence performance for the former complex.

Original language	English
Pages (from-to)	344-346
Number of pages	3
Journal	Journal of Alloys and Compounds
Volume	451
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2007.04.141
State	Published - Feb 28 2008
Externally published	Yes

Funding

The authors are grateful to FCT, OE and FEDER for funding (Project POCI/CTM/58863/2004).

Keywords

Europium β-diketonate complex
Photoluminescence
Pyrazolylpyridine ligands

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10.1016/j.jallcom.2007.04.141

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@article{244670c3311f45a7acb68a1770bd3a3b,

title = "Spectroscopic studies of an europium(III) tris-β-diketonate complex bearing a pyrazolylpyridine ligand",

abstract = "A new europium(III) complex, Eu(BTA)3(ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate) (where BTA: 1-benzoyl-3,3,3-trifluoroacetonate), was synthesised by simple ligand exchange with the solvent adduct Eu(BTA)3(H2O)2. The compound was characterised by elemental analysis, thermogravimetry, FTIR, FT Raman and photoluminescence spectroscopies. A significant increase of the 5D0 lifetime of the complex, relative to the value found for the water-coordinated adduct (from 0.657 ± 0.001 to 0.835 ± 0.002 ms), and a larger contribution of the ligand levels to the excitation spectrum indicate a better photoluminescence performance for the former complex.",

keywords = "Europium β-diketonate complex, Photoluminescence, Pyrazolylpyridine ligands",

author = "\{dos Santos\}, \{Ant{\'o}nio Moreira\} and Coelho, \{Ana C.\} and Paz, \{Filipe A.Almeida\} and Jo{\~a}o Rocha and Gon{\c c}alves, \{Isabel S.\} and Carlos, \{Lu{\'i}s D.\}",

year = "2008",

month = feb,

day = "28",

doi = "10.1016/j.jallcom.2007.04.141",

language = "English",

volume = "451",

pages = "344--346",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier",

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TY - JOUR

T1 - Spectroscopic studies of an europium(III) tris-β-diketonate complex bearing a pyrazolylpyridine ligand

AU - dos Santos, António Moreira

AU - Coelho, Ana C.

AU - Paz, Filipe A.Almeida

AU - Rocha, João

AU - Gonçalves, Isabel S.

AU - Carlos, Luís D.

PY - 2008/2/28

Y1 - 2008/2/28

N2 - A new europium(III) complex, Eu(BTA)3(ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate) (where BTA: 1-benzoyl-3,3,3-trifluoroacetonate), was synthesised by simple ligand exchange with the solvent adduct Eu(BTA)3(H2O)2. The compound was characterised by elemental analysis, thermogravimetry, FTIR, FT Raman and photoluminescence spectroscopies. A significant increase of the 5D0 lifetime of the complex, relative to the value found for the water-coordinated adduct (from 0.657 ± 0.001 to 0.835 ± 0.002 ms), and a larger contribution of the ligand levels to the excitation spectrum indicate a better photoluminescence performance for the former complex.

AB - A new europium(III) complex, Eu(BTA)3(ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate) (where BTA: 1-benzoyl-3,3,3-trifluoroacetonate), was synthesised by simple ligand exchange with the solvent adduct Eu(BTA)3(H2O)2. The compound was characterised by elemental analysis, thermogravimetry, FTIR, FT Raman and photoluminescence spectroscopies. A significant increase of the 5D0 lifetime of the complex, relative to the value found for the water-coordinated adduct (from 0.657 ± 0.001 to 0.835 ± 0.002 ms), and a larger contribution of the ligand levels to the excitation spectrum indicate a better photoluminescence performance for the former complex.

KW - Europium β-diketonate complex

KW - Photoluminescence

KW - Pyrazolylpyridine ligands

UR - https://www.scopus.com/pages/publications/38349103604

U2 - 10.1016/j.jallcom.2007.04.141

DO - 10.1016/j.jallcom.2007.04.141

M3 - Article

AN - SCOPUS:38349103604

SN - 0925-8388

VL - 451

SP - 344

EP - 346

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Spectroscopic studies of an europium(III) tris-β-diketonate complex bearing a pyrazolylpyridine ligand

Abstract

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Keywords

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