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Pushkarev AP, Yablonskiy AN, Yunin PA, et al. Features of spectral properties of Sm(3+) complexes with dithia- and diselenophosphinate ligands. Spectrochim Acta A Mol Biomol Spectrosc. 2016;163:134-9doi: 10.1016/j.saa.2016.03.026.
Pushkarev, A. P., Yablonskiy, A. N., Yunin, P. A., Burin, M. E., Andreev, B. A., & Bochkarev, M. N. (2016). Features of spectral properties of Sm(3+) complexes with dithia- and diselenophosphinate ligands. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 163134-9. https://doi.org/10.1016/j.saa.2016.03.026
Pushkarev, A P, et al. "Features of spectral properties of Sm(3+) complexes with dithia- and diselenophosphinate ligands." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 163 (2016): 134-9. doi: https://doi.org/10.1016/j.saa.2016.03.026
Pushkarev AP, Yablonskiy AN, Yunin PA, Burin ME, Andreev BA, Bochkarev MN. Features of spectral properties of Sm(3+) complexes with dithia- and diselenophosphinate ligands. Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jun 15;163:134-9. doi: 10.1016/j.saa.2016.03.026. Epub 2016 Mar 25. PMID: 27045786.
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Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jun 15;163:134-9. doi: 10.1016/j.saa.2016.03.026. Epub 2016 Mar 25.

Features of spectral properties of Sm(3+) complexes with dithia- and diselenophosphinate ligands.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

A P Pushkarev, A N Yablonskiy, P A Yunin, M E Burin, B A Andreev, M N Bochkarev

Affiliations

  1. G.A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation. Electronic address: [email protected].
  2. Nizhny Novgorod State University, Gagarina avenue 23/2, 603950 Nizhny Novgorod, Russian Federation; Institute for Physics of Microstructures of Russian Academy of Sciences, 7 ul. Akademicheskaya, 603950 Nizhny Novgorod, Russian Federation.
  3. G.A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation; Nizhny Novgorod State University, Gagarina avenue 23/2, 603950 Nizhny Novgorod, Russian Federation.

PMID: 27045786 DOI: 10.1016/j.saa.2016.03.026

Abstract

The samarium complexes Sm(S2PPh2)3(THF)2 (1) and Sm(Se2PPh2)3(THF)2 (2) with soft-donor dithia- and diselenophosphinate ligands were synthesized and their photophysical properties were studied in detail. Both complexes displayed the metal-centered photoluminescence (PL) in visible and NIR regions corresponding to (4)G5/2→(6)HJ (J=5/2, 7/2, 9/2, 11/2, 13/2, 15/2), (6)FJ (J=1/2, 3/2, 5/2, 7/2, 9/2, 11/2) f-f transitions of Sm(3+). Luminescence decay curves exhibit an initial short build-up region and can be described by double or triple exponential function owing to multiphonon relaxation from the (4)F3/2 energy level to the (4)G5/2 one and reversible energy transfer from the Sm(3+) excited states to the triplet ((3)T1) state of phosphinate ligand. A Judd-Ofelt analysis was performed to estimate PL quantum efficiency (QE), branching ratios (β) and induced-emission cross section (σem) of the compounds obtained. It was found that the Judd-Ofelt parameter Ω2 of 1 is significantly greater than that of 2. This feature is responsible for large values of β (50.98%) and σem (4.29×10(-21)cm(2)) which suggest 1 as a good candidate for the development of samarium doped polymethylmethacrylate (PMMA) laser medium acting on the (4)G5/2→(6)H9/2 transition at 645nm. The estimated room-temperature PL QE of 1 and 2 equals to 1.9 and 0.17%, respectively.

Copyright © 2016 Elsevier B.V. All rights reserved.

Keywords: Judd–Ofelt analysis; Luminescence; Sm3+ complex; Soft-donor ligand

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