Article (Scientific journals)
Optical study of oriented double-Se8-ring clusters and luminescent Se2− anions in LTA at extremely high selenium loading density
Poborchii, Vladimir V.; Petranovskii, Vitalii P.; Glukhov, Igor A. et al.
2023In Microporous and Mesoporous Materials, 348, p. 112395
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Keywords :
Photoluminescence; Raman/Brillouin microscopy; Selenium; Zeolite single crystals; Brillouin microscopy; Concentration ratio; Large cavities; Loading density; Optical study; Polarization orientation; Raman/brillouin microscopy; Ring clusters; Unit cells; Zeolite single crystal; Chemistry (all); Materials Science (all); Condensed Matter Physics; Mechanics of Materials; General Materials Science; General Chemistry
Abstract :
[en] Recently, LTA-Se(1–8) samples with 1–8 Se atoms per cavity (simplified unit cell, large cavity + sodalite cage) obtained via adsorption at the temperature of ∼450 °C were reported. It was shown that single Se8 or single Se12 ring are formed in the large LTA cavities, Se8/Se12 ring concentration ratio decreasing with an increase in the Se loading density. Contrary, in the present work, using Se vapour adsorption at ∼550 °C, we succeeded in encapsulation of ∼17 Se atoms per cavity (LTA-Se(17)) with a significant increase in the Se8/Se12 concentration ratio manifesting double Se8-ring cluster formation in the most of the LTA large cavities, which is a step towards cluster crystal fabrication. According to our polarization/orientation Raman spectroscopic study of LTA-Se(17) single crystals, the orientations of the Se8 and Se12 appeared to be similar to those in previously investigated LTA-Se(1–8). Importantly, luminescent Se2− anions, oriented along the LTA 4-fold axes and located in the sodalite cages, are detected via Raman polarization/orientation dependencies of LTA-Se(17). Bright Se2− light emission with a maximum at ∼1.56 eV and vibronic structure is observed in the 1.3–1.8 eV spectral range. We show that the anions experience a compression in LTA which is slightly relaxing with a decrease in temperature producing an anomalous Raman band downshift. The compression of Se2− in LTA is weaker/stronger than that in sodalite/cancrinite, luminescence band photon energy depending on its strength. High concentration of regularly arranged Se2− in LTA suggests considering LTA-Se(17) as an important novel light-emitting material.
Disciplines :
Electrical & electronics engineering
Physics
Author, co-author :
Poborchii, Vladimir V. ;  National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Petranovskii, Vitalii P.;  Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
Glukhov, Igor A. ;  Lab-STICC (UMR CNRS 6285), École Nationale d'Ingénieurs de Brest, France ; Ulyanovsk State University, Ulyanovsk, Russian Federation
Fotiadi, Andrei  ;  Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications ; Optoelectronics and Measurement Techniques unit, University of Oulu, Oulu, Finland
Language :
English
Title :
Optical study of oriented double-Se8-ring clusters and luminescent Se2− anions in LTA at extremely high selenium loading density
Publication date :
15 January 2023
Journal title :
Microporous and Mesoporous Materials
ISSN :
1387-1811
eISSN :
1873-3093
Publisher :
Elsevier B.V.
Volume :
348
Pages :
112395
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
F108 - Electromagnétisme et Télécommunications
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
European Projects :
H2020 - 101028712 - HiFi Brilliancy - HIgh-speed FIbre-based BRILLouIn ANalyzer for endosCopY
Funders :
Horizon 2020
H2020 Marie Skłodowska-Curie Actions
Horizon 2020 European Innovation Council Fast Track to Innovation
Ministry of Education and Science of the Russian Federation
Union Européenne
Funding number :
H2020-MSCA-IF-2020, #101028712
Funding text :
We thank G.-G. Lindner for SOD-Se and CAN-Se samples containing Se 2 − . I.A.G. kindly acknowledges for the support from Ministry of Science and Higher Education of the Russian Federation ( 075-15-2021-581 ). A.A.F. is supported by the European Union's Horizon 2020 research and innovation programme ( H2020-MSCA–IF–2020 , #101028712 ).
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