Crystal structure and optical properties of Eu3+–doped and undoped complex sulfate KSc(SO4)2 produced by facile and efficient crystallization process

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Crystal structure and optical properties of Eu3+–doped and undoped complex sulfate KSc(SO4)2 produced by facile and efficient crystallization process. / Pasechnik, L.; Lipina, O.; Medyankina, I. и др.
в: Journal of Alloys and Compounds, Том 984, 173968, 01.05.2024.

Результаты исследований: Вклад в журнал › Статья › Рецензирование

BibTeX

@article{effe633ae8844d07bc046973d76b292c,

title = "Crystal structure and optical properties of Eu3+–doped and undoped complex sulfate KSc(SO4)2 produced by facile and efficient crystallization process",

abstract = "Both pristine and Eu3+-doped scandium-potassium complex sulfate KSc(SO4)2 has been obtained with 99% yield via crystallization from solutions. The high-temperature XRPD and thermal studies revealed an enantiotropic first-order phase transition at 700–725 K and standard pressure. In the temperature region 724–754 K, the low-temperature stable monoclinic polymorph, β-KSc(SO4)2 (sp.gr. С2/m), coexists with the high-temperature trigonal modification, α-KSc(SO4)2 (sp.gr. P321), with decomposition at ∼1120 K. DFT calculations confirmed this rank of polymorphs and a low hospitality of their Sc-sublattices for Eu3+ cations. Under UV excitation, the KSc0.98Eu0.02(SO4)2 sample exhibits Eu3+ luminescence at 570−720 nm. Heating of the sample from 298 K to 423 K leads to a luminescence fading of 13% and to its a sharp decline at elevated temperatures. Kinetic studies have shown that the lifetime depends on the chosen excitation wavelength and temperature. An Х-band resonance in the sample of KSc(SO4)2:Eu3+ has been detected in the temperature range of 299–500 K. The EPR spectra are interpreted assuming the presence of sulfate radicals.",

author = "L. Pasechnik and O. Lipina and I. Medyankina and R. Samigullina and A. Enyashin and A. Chufarov and M. Melkozerova and M. Artyomov and A. Tyutyunnik",

note = "The X-ray study was carried out at the Multiple-Access Centre for X-ray Structure Analysis at the Institute of Solid State Chemistry, UB RAS. This work was performed in accordance with the state assignment by the Ministry of Science and Higher Education of the Russian Federation: themes No. 124020600007-8 and 124020600024-5 .",

year = "2024",

month = may,

day = "1",

doi = "10.1016/j.jallcom.2024.173968",

language = "English",

volume = "984",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier Inc.",

}

RIS

TY - JOUR

T1 - Crystal structure and optical properties of Eu3+–doped and undoped complex sulfate KSc(SO4)2 produced by facile and efficient crystallization process

AU - Pasechnik, L.

AU - Lipina, O.

AU - Medyankina, I.

AU - Samigullina, R.

AU - Enyashin, A.

AU - Chufarov, A.

AU - Melkozerova, M.

AU - Artyomov, M.

AU - Tyutyunnik, A.

N1 - The X-ray study was carried out at the Multiple-Access Centre for X-ray Structure Analysis at the Institute of Solid State Chemistry, UB RAS. This work was performed in accordance with the state assignment by the Ministry of Science and Higher Education of the Russian Federation: themes No. 124020600007-8 and 124020600024-5 .

PY - 2024/5/1

Y1 - 2024/5/1

N2 - Both pristine and Eu3+-doped scandium-potassium complex sulfate KSc(SO4)2 has been obtained with 99% yield via crystallization from solutions. The high-temperature XRPD and thermal studies revealed an enantiotropic first-order phase transition at 700–725 K and standard pressure. In the temperature region 724–754 K, the low-temperature stable monoclinic polymorph, β-KSc(SO4)2 (sp.gr. С2/m), coexists with the high-temperature trigonal modification, α-KSc(SO4)2 (sp.gr. P321), with decomposition at ∼1120 K. DFT calculations confirmed this rank of polymorphs and a low hospitality of their Sc-sublattices for Eu3+ cations. Under UV excitation, the KSc0.98Eu0.02(SO4)2 sample exhibits Eu3+ luminescence at 570−720 nm. Heating of the sample from 298 K to 423 K leads to a luminescence fading of 13% and to its a sharp decline at elevated temperatures. Kinetic studies have shown that the lifetime depends on the chosen excitation wavelength and temperature. An Х-band resonance in the sample of KSc(SO4)2:Eu3+ has been detected in the temperature range of 299–500 K. The EPR spectra are interpreted assuming the presence of sulfate radicals.

AB - Both pristine and Eu3+-doped scandium-potassium complex sulfate KSc(SO4)2 has been obtained with 99% yield via crystallization from solutions. The high-temperature XRPD and thermal studies revealed an enantiotropic first-order phase transition at 700–725 K and standard pressure. In the temperature region 724–754 K, the low-temperature stable monoclinic polymorph, β-KSc(SO4)2 (sp.gr. С2/m), coexists with the high-temperature trigonal modification, α-KSc(SO4)2 (sp.gr. P321), with decomposition at ∼1120 K. DFT calculations confirmed this rank of polymorphs and a low hospitality of their Sc-sublattices for Eu3+ cations. Under UV excitation, the KSc0.98Eu0.02(SO4)2 sample exhibits Eu3+ luminescence at 570−720 nm. Heating of the sample from 298 K to 423 K leads to a luminescence fading of 13% and to its a sharp decline at elevated temperatures. Kinetic studies have shown that the lifetime depends on the chosen excitation wavelength and temperature. An Х-band resonance in the sample of KSc(SO4)2:Eu3+ has been detected in the temperature range of 299–500 K. The EPR spectra are interpreted assuming the presence of sulfate radicals.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85186433914

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001198413600001

U2 - 10.1016/j.jallcom.2024.173968

DO - 10.1016/j.jallcom.2024.173968

M3 - Article

VL - 984

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 173968

ER -

ID: 53803078