Dyes and Pigments, volume 181, pages 108558
Bright NIR-luminescent Nd3+ complexes with pyrazole-substituted 1,3-diketones demonstrated an unusual spectral lines branching ratios
Metlina D A
1
,
Metlin M T
1
,
Ambrozevich S A
1, 2, 3
,
Selyukov A S
,
Selyukov Alexandr S
1, 4
,
Datskevich N P
1
,
Aminev D F
1
,
Goryachii D O
1
,
Lyssenko Konstantin A.
5, 6
,
Lyssenko K.A.
,
Pavlov Alexander
7
,
Dmitrienko A O
7
,
Taydakov Ilya V.
1
,
Taydakov I V
Publication type: Journal Article
Publication date: 2020-10-01
Journal:
Dyes and Pigments
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 4.5
ISSN: 01437208, 18733743
General Chemical Engineering
Process Chemistry and Technology
Abstract
A series of novel highly NIR-emitting Nd 3 + complexes with specially designed 1,3-diketones bearing a pyrazole moiety and a linear C x F 2 x + 1 group ( x = 1 , 3 , 6 ) was obtained and exhaustively investigated. It was demonstrated that for the complexes with an increased number of fluorine atoms, the triplet level energy of the ligands is decreased and phonon relaxation processes are suppressed. This provides a remarkable increase in the photoluminescence quantum yield up to 1.1%, which is close to the highest values reported for Nd 3 + complexes with 1,3-diketones. The photoluminescence spectra of the complexes exhibited the Stark splitting indicative of non-cubic symmetry. Low symmetry of coordination environment was confirmed by the X-ray structural data and analysis of calculated Judd–Ofelt intensity parameters. Besides, it was revealed that the most intense band in the PL spectrum is attributed to the 4 F 3 ∕ 2 → 4 I 9 ∕ 2 transition (at 880 nm) which is commonly rather weak for simple diketonate complexes. The calculations showed that the unexpectedly high branching ratio of the 4 F 3 ∕ 2 → 4 I 9 ∕ 2 transition raises with elongation of the fluorinated chain and reaches 59% for the complex with x = 6 . The studies were conducted for solutions of the complexes as well as for solid samples, and the corresponding changes in their optical behavior were discussed. Uncommon properties of the synthesized Nd 3 + complexes make them promising materials for various state-of-the-art luminescent applications, e.g., luminescent markers with an unusual spectral intensity distribution. Based on the electroluminescence studies, we also estimated the potential of the complexes for purely NIR-emitting OLEDs fabrication.
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Metlina D. A. et al. Bright NIR-luminescent Nd3+ complexes with pyrazole-substituted 1,3-diketones demonstrated an unusual spectral lines branching ratios // Dyes and Pigments. 2020. Vol. 181. p. 108558.
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Metlina D. A., Metlin M. T., Ambrozevich S. A., Selyukov A. S., Selyukov A. S., Datskevich N. P., Aminev D. F., Goryachii D. O., Lyssenko K. A., Lyssenko K., Pavlov A., Pavlov A. A., Dmitrienko A. O., Taydakov I. V., Taydakov I. V. Bright NIR-luminescent Nd3+ complexes with pyrazole-substituted 1,3-diketones demonstrated an unusual spectral lines branching ratios // Dyes and Pigments. 2020. Vol. 181. p. 108558.
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TY - JOUR
DO - 10.1016/j.dyepig.2020.108558
UR - https://doi.org/10.1016%2Fj.dyepig.2020.108558
TI - Bright NIR-luminescent Nd3+ complexes with pyrazole-substituted 1,3-diketones demonstrated an unusual spectral lines branching ratios
T2 - Dyes and Pigments
AU - Metlina, D A
AU - Metlin, M T
AU - Ambrozevich, S A
AU - Selyukov, Alexandr S
AU - Datskevich, N P
AU - Aminev, D F
AU - Goryachii, D O
AU - Lyssenko, Konstantin A.
AU - Pavlov, Alexander
AU - Dmitrienko, A O
AU - Taydakov, Ilya V.
AU - Selyukov, A S
AU - Lyssenko, K.A.
AU - Pavlov, A. A.
AU - Taydakov, I V
PY - 2020
DA - 2020/10/01 00:00:00
PB - Elsevier
SP - 108558
VL - 181
SN - 0143-7208
SN - 1873-3743
ER -
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@article{2020_Metlina,
author = {D A Metlina and M T Metlin and S A Ambrozevich and Alexandr S Selyukov and N P Datskevich and D F Aminev and D O Goryachii and Konstantin A. Lyssenko and Alexander Pavlov and A O Dmitrienko and Ilya V. Taydakov and A S Selyukov and K.A. Lyssenko and A. A. Pavlov and I V Taydakov},
title = {Bright NIR-luminescent Nd3+ complexes with pyrazole-substituted 1,3-diketones demonstrated an unusual spectral lines branching ratios},
journal = {Dyes and Pigments},
year = {2020},
volume = {181},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016%2Fj.dyepig.2020.108558},
pages = {108558},
doi = {10.1016/j.dyepig.2020.108558}
}