Modified pyridine-2,6-dicarboxylate acid ligands for sensitization of near-infrared luminescence from lanthanide ions (Ln3+ = Pr3+, Nd3+, Gd3+, Dy3+, Er3+)
Modified pyridine-2,6-dicarboxylate acid ligands for sensitization of near-infrared luminescence from lanthanide ions (Ln3+ = Pr3+, Nd3+, Gd3+, Dy3+, Er3+)
A detailed study of the ability of pyridine-2,6-dicarboxylic acid (1) and its 4-mono- and 3,4,5-tri substituted analogues to sensitize emission from Pr3+, Nd3+, Gd3+, Dy3+ and Er3+ is presented. Sensitization of Ln3+ emission was demonstrated via the ligands in all complexes, excluding Gd3+, with emission
covering the spectral range from 500 nm to 1850 nm obtained with variation of the Ln3+ ion. From the study of the ligand-based photoluminescence obtained from Gd3+-complexes, and the relative ligand and Ln3+ emission obtained from the other complexes, the singlet and triplet state energies of complexes of
(1) are estimated to be at 3.1 eV and 2.6 eV respectively whilst for the 3,5-dibromo-substituted complexes (4) they are at 2.9 eV and 2.3 eV. Hypersensitivity of the Er3+ 4I15/2 → 2H11/2 and 4I15/2 → 4G11/2 intra
atomic transitions is also observed in the 4-chloro-substituted (3) complex. Enhanced sensitization of Nd3+ (ca. 5-fold) and Er3+ (ca. 2-fold) near-infrared emission is demonstrated for complexes of (3) and (4) respectively in comparison with those of (1).
Judd-Ofelt, Lanthanide luminescence, energy transfer, organolanthanide, photoluminescence
George, Michael R.
4534698f-522e-47d1-8f94-a7d852208367
Critchley, Paul E.
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Whitehead, George F.S.
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Bailey, Andrew
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Cuda, Francesco
62081a41-0b7a-4ec6-834b-2f773551f2d6
Murdin, Benedict N.
3879104a-7f55-4c3f-9022-573d82337366
Grossel, Martin
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Curry, Richard J.
409b626f-f0b9-4b5e-a12c-6f8b87d20ee0
February 2021
George, Michael R.
4534698f-522e-47d1-8f94-a7d852208367
Critchley, Paul E.
04684edd-1ce1-403f-b5cd-679cee2086d5
Whitehead, George F.S.
cc7bb158-0d62-4862-b41a-9aff472e5b68
Bailey, Andrew
681e159f-1563-4350-94eb-e6c01321fbed
Cuda, Francesco
62081a41-0b7a-4ec6-834b-2f773551f2d6
Murdin, Benedict N.
3879104a-7f55-4c3f-9022-573d82337366
Grossel, Martin
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Curry, Richard J.
409b626f-f0b9-4b5e-a12c-6f8b87d20ee0
George, Michael R., Critchley, Paul E., Whitehead, George F.S., Bailey, Andrew, Cuda, Francesco, Murdin, Benedict N., Grossel, Martin and Curry, Richard J.
(2021)
Modified pyridine-2,6-dicarboxylate acid ligands for sensitization of near-infrared luminescence from lanthanide ions (Ln3+ = Pr3+, Nd3+, Gd3+, Dy3+, Er3+).
Journal of Luminescence, 230, [117715].
(doi:10.1016/j.jlumin.2020.117715).
Abstract
A detailed study of the ability of pyridine-2,6-dicarboxylic acid (1) and its 4-mono- and 3,4,5-tri substituted analogues to sensitize emission from Pr3+, Nd3+, Gd3+, Dy3+ and Er3+ is presented. Sensitization of Ln3+ emission was demonstrated via the ligands in all complexes, excluding Gd3+, with emission
covering the spectral range from 500 nm to 1850 nm obtained with variation of the Ln3+ ion. From the study of the ligand-based photoluminescence obtained from Gd3+-complexes, and the relative ligand and Ln3+ emission obtained from the other complexes, the singlet and triplet state energies of complexes of
(1) are estimated to be at 3.1 eV and 2.6 eV respectively whilst for the 3,5-dibromo-substituted complexes (4) they are at 2.9 eV and 2.3 eV. Hypersensitivity of the Er3+ 4I15/2 → 2H11/2 and 4I15/2 → 4G11/2 intra
atomic transitions is also observed in the 4-chloro-substituted (3) complex. Enhanced sensitization of Nd3+ (ca. 5-fold) and Er3+ (ca. 2-fold) near-infrared emission is demonstrated for complexes of (3) and (4) respectively in comparison with those of (1).
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Accepted/In Press date: 20 October 2020
e-pub ahead of print date: 23 October 2020
Published date: February 2021
Additional Information:
Funding Information:
We thank the EPSRC for studentships to AJB, MRG and PEC.
Publisher Copyright:
© 2020 Elsevier B.V.
Keywords:
Judd-Ofelt, Lanthanide luminescence, energy transfer, organolanthanide, photoluminescence
Identifiers
Local EPrints ID: 444842
URI: http://eprints.soton.ac.uk/id/eprint/444842
ISSN: 0022-2313
PURE UUID: 7037a863-9f94-4c53-ad34-087a907282e4
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Date deposited: 06 Nov 2020 17:31
Last modified: 17 Mar 2024 06:01
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Contributors
Author:
Michael R. George
Author:
Paul E. Critchley
Author:
George F.S. Whitehead
Author:
Andrew Bailey
Author:
Francesco Cuda
Author:
Benedict N. Murdin
Author:
Richard J. Curry
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