Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Synthesis of samarium oxysulfateSm2O2SO4 in the high-temperature oxidation reaction and its structural, thermal and luminescent properties. / Denisenko, Yu G.; Sal'nikova, E. I.; Basova, S. A. и др.
в: Molecules, Том 25, № 6, 1330, 14.03.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Synthesis of samarium oxysulfateSm2O2SO4 in the high-temperature oxidation reaction and its structural, thermal and luminescent properties
AU - Denisenko, Yu G.
AU - Sal'nikova, E. I.
AU - Basova, S. A.
AU - Molokeev, M. S.
AU - Krylov, A. S.
AU - Aleksandrovsky, A. S.
AU - Oreshonkov, A. S.
AU - Atuchin, V. V.
AU - Volkova, S. S.
AU - Khritokhin, N. A.
AU - Andreev, O. V.
PY - 2020/3/14
Y1 - 2020/3/14
N2 - The oxidation process of samariumoxysulfide was studied in the temperature range of 500-1000 °C. Our DTA investigation allowed for establishing the main thermodynamic (∆Hº exp = -654.6 kJ/mol) and kinetic characteristics of the process (E a = 244 kJ/mol, A = 2 × 10 10). The enthalpy value of samarium oxysulfate (ΔHºf (Sm 2O 2SO 4(monocl)) = -2294.0 kJ/mol) formation was calculated. The calculated process enthalpy value coincides with the value determined in the experiment. It was established that samarium oxysulfate crystallizes in the monoclinic symmetry class and its crystal structure belongs to space group C2/ c with unit cell parameters a = 13.7442 (2), b = 4.20178 (4) and c = 8.16711 (8)Å, β = 107.224 (1)°, V = 450.498 (9)Å 3, Z = 4. The main elements of the crystalline structure are obtained and the cation coordination environment is analyzed in detail. Vibrational spectroscopy methods confirmed the structural model adequacy. The Sm 2O 2SO 4luminescence spectra exhibit three main bands easily assignable to the transitions from 4G 5/2 state to 6H 5/2, 6H 7/2, and 6H 9/2 multiplets.
AB - The oxidation process of samariumoxysulfide was studied in the temperature range of 500-1000 °C. Our DTA investigation allowed for establishing the main thermodynamic (∆Hº exp = -654.6 kJ/mol) and kinetic characteristics of the process (E a = 244 kJ/mol, A = 2 × 10 10). The enthalpy value of samarium oxysulfate (ΔHºf (Sm 2O 2SO 4(monocl)) = -2294.0 kJ/mol) formation was calculated. The calculated process enthalpy value coincides with the value determined in the experiment. It was established that samarium oxysulfate crystallizes in the monoclinic symmetry class and its crystal structure belongs to space group C2/ c with unit cell parameters a = 13.7442 (2), b = 4.20178 (4) and c = 8.16711 (8)Å, β = 107.224 (1)°, V = 450.498 (9)Å 3, Z = 4. The main elements of the crystalline structure are obtained and the cation coordination environment is analyzed in detail. Vibrational spectroscopy methods confirmed the structural model adequacy. The Sm 2O 2SO 4luminescence spectra exhibit three main bands easily assignable to the transitions from 4G 5/2 state to 6H 5/2, 6H 7/2, and 6H 9/2 multiplets.
KW - Luminescence
KW - Oxysulfate
KW - Samarium
KW - Structure
KW - Thermochemistry
KW - samarium
KW - LN
KW - PR
KW - SPECTROSCOPIC PROPERTIES
KW - RARE-EARTH SULFATES
KW - DECOMPOSITION
KW - oxysulfate
KW - structure
KW - thermochemistry
KW - OXYGEN-STORAGE
KW - LN(2)O(2)SO(4)
KW - luminescence
KW - LA
KW - KINETICS
KW - ND
UR - http://www.scopus.com/inward/record.url?scp=85081649606&partnerID=8YFLogxK
U2 - 10.3390/molecules25061330
DO - 10.3390/molecules25061330
M3 - Article
C2 - 32183320
AN - SCOPUS:85081649606
VL - 25
JO - Molecules
JF - Molecules
SN - 1420-3049
IS - 6
M1 - 1330
ER -
ID: 23806721