Heteroleptic β-diketonate Ln(iii) complexes decorated with pyridyl substituted pyridazine ligands: Synthesis, structure and luminescence properties

Viktoria V. Khistiaeva, Alexey S. Melnikov, Sofia O. Slavova, Vladimir V. Sizov, Galina L. Starova, Igor O. Koshevoy, Elena V. Grachova

Research output

3 Citations (Scopus)

Abstract

A substituted pyridazine was used to construct a family of mononuclear heteroleptic complexes [Ln(tta)3(dppn)], Ln = Pr-Lu; Htta = thenoyltrifluoroacetone; dppn = 3,6-di(2-pyridyl)pyridazine. All the complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass spectrometry, FTIR spectroscopy and single crystal X-ray analysis. The photophysical properties of lanthanide complexes were carefully investigated, and the dppn ligand was found to act as a chromophore centre to sensitize metal-centred emission of the Nd, Sm, Eu, and Yb complexes under UV excitation. It has been shown that a powder sample of the Eu complex can contain two isomers with somewhat different symmetries of the environment of the metallocentre. The mechanism for the emission of luminescent Nd, Sm, Eu, and Yb complexes was investigated by TDDFT calculations and the results confirmed the conclusion made on the basis of experimental data regarding the likely pathway of energy transfer from the chromophore centre to the emissive level of Ln(iii).

Original languageEnglish
Pages (from-to)3015-3027
Number of pages13
JournalInorganic Chemistry Frontiers
Volume5
Issue number12
Early online date19 Sep 2018
DOIs
Publication statusPublished - 1 Dec 2018

Fingerprint

Chromophores
Luminescence
Thenoyltrifluoroacetone
Ligands
Lanthanoid Series Elements
X ray analysis
Isomers
Powders
Energy transfer
Nuclear magnetic resonance spectroscopy
Mass spectrometry
Metals
Single crystals
Spectroscopy
Chemical analysis
pyridazine

Scopus subject areas

  • Inorganic Chemistry

Cite this

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title = "Heteroleptic β-diketonate Ln(iii) complexes decorated with pyridyl substituted pyridazine ligands: Synthesis, structure and luminescence properties",
abstract = "A substituted pyridazine was used to construct a family of mononuclear heteroleptic complexes [Ln(tta)3(dppn)], Ln = Pr-Lu; Htta = thenoyltrifluoroacetone; dppn = 3,6-di(2-pyridyl)pyridazine. All the complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass spectrometry, FTIR spectroscopy and single crystal X-ray analysis. The photophysical properties of lanthanide complexes were carefully investigated, and the dppn ligand was found to act as a chromophore centre to sensitize metal-centred emission of the Nd, Sm, Eu, and Yb complexes under UV excitation. It has been shown that a powder sample of the Eu complex can contain two isomers with somewhat different symmetries of the environment of the metallocentre. The mechanism for the emission of luminescent Nd, Sm, Eu, and Yb complexes was investigated by TDDFT calculations and the results confirmed the conclusion made on the basis of experimental data regarding the likely pathway of energy transfer from the chromophore centre to the emissive level of Ln(iii).",
keywords = "GENERALIZED-GRADIENT-APPROXIMATION, INTRAMOLECULAR ENERGY-TRANSFER, SINGLE-MOLECULE MAGNET, EUROPIUM COMPLEXES, HIGHLY LUMINESCENT, LANTHANIDE COMPLEXES, CRYSTAL-STRUCTURE, PHOTOPHYSICAL PROPERTIES, RELAXATION PROCESSES, EU(III) COMPLEX",
author = "Khistiaeva, {Viktoria V.} and Melnikov, {Alexey S.} and Slavova, {Sofia O.} and Sizov, {Vladimir V.} and Starova, {Galina L.} and Koshevoy, {Igor O.} and Grachova, {Elena V.}",
year = "2018",
month = "12",
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journal = "Inorganic Chemistry Frontiers",
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TY - JOUR

T1 - Heteroleptic β-diketonate Ln(iii) complexes decorated with pyridyl substituted pyridazine ligands

T2 - Synthesis, structure and luminescence properties

AU - Khistiaeva, Viktoria V.

AU - Melnikov, Alexey S.

AU - Slavova, Sofia O.

AU - Sizov, Vladimir V.

AU - Starova, Galina L.

AU - Koshevoy, Igor O.

AU - Grachova, Elena V.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - A substituted pyridazine was used to construct a family of mononuclear heteroleptic complexes [Ln(tta)3(dppn)], Ln = Pr-Lu; Htta = thenoyltrifluoroacetone; dppn = 3,6-di(2-pyridyl)pyridazine. All the complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass spectrometry, FTIR spectroscopy and single crystal X-ray analysis. The photophysical properties of lanthanide complexes were carefully investigated, and the dppn ligand was found to act as a chromophore centre to sensitize metal-centred emission of the Nd, Sm, Eu, and Yb complexes under UV excitation. It has been shown that a powder sample of the Eu complex can contain two isomers with somewhat different symmetries of the environment of the metallocentre. The mechanism for the emission of luminescent Nd, Sm, Eu, and Yb complexes was investigated by TDDFT calculations and the results confirmed the conclusion made on the basis of experimental data regarding the likely pathway of energy transfer from the chromophore centre to the emissive level of Ln(iii).

AB - A substituted pyridazine was used to construct a family of mononuclear heteroleptic complexes [Ln(tta)3(dppn)], Ln = Pr-Lu; Htta = thenoyltrifluoroacetone; dppn = 3,6-di(2-pyridyl)pyridazine. All the complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass spectrometry, FTIR spectroscopy and single crystal X-ray analysis. The photophysical properties of lanthanide complexes were carefully investigated, and the dppn ligand was found to act as a chromophore centre to sensitize metal-centred emission of the Nd, Sm, Eu, and Yb complexes under UV excitation. It has been shown that a powder sample of the Eu complex can contain two isomers with somewhat different symmetries of the environment of the metallocentre. The mechanism for the emission of luminescent Nd, Sm, Eu, and Yb complexes was investigated by TDDFT calculations and the results confirmed the conclusion made on the basis of experimental data regarding the likely pathway of energy transfer from the chromophore centre to the emissive level of Ln(iii).

KW - GENERALIZED-GRADIENT-APPROXIMATION

KW - INTRAMOLECULAR ENERGY-TRANSFER

KW - SINGLE-MOLECULE MAGNET

KW - EUROPIUM COMPLEXES

KW - HIGHLY LUMINESCENT

KW - LANTHANIDE COMPLEXES

KW - CRYSTAL-STRUCTURE

KW - PHOTOPHYSICAL PROPERTIES

KW - RELAXATION PROCESSES

KW - EU(III) COMPLEX

UR - http://www.scopus.com/inward/record.url?scp=85058181355&partnerID=8YFLogxK

UR - http://xlink.rsc.org/?DOI=C8QI00712H

UR - http://www.mendeley.com/research/heteroleptic-%CE%B2diketonate-lniii-complexes-decorated-pyridyl-substituted-pyridazine-ligands-synthesis

U2 - 10.1039/C8QI00712H

DO - 10.1039/C8QI00712H

M3 - Article

AN - SCOPUS:85058181355

VL - 5

SP - 3015

EP - 3027

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

SN - 2052-1545

IS - 12

ER -