硫酸氧钐（SmOSO）的高温氧化反应合成及其结构、热和发光性能。

Synthesis of Samarium OxysulfateSmOSO in the High-Temperature Oxidation Reaction and Its Structural, Thermal and Luminescent Properties.

机构信息

Department of General and Special Chemistry, Industrial University of Tyumen, 625000 Tyumen, Russia.

Institute of Chemistry, Tyumen State University, 625003 Tyumen, Russia.

出版信息

Molecules. 2020 Mar 14;25(6):1330. doi: 10.3390/molecules25061330.

DOI:10.3390/molecules25061330

PMID:32183320

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7144115/

Abstract

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 = -654.6 kJ/mol) and kinetic characteristics of the process (E = 244 kJ/mol, A = 2 × 10). The enthalpy value of samarium oxysulfate (ΔHºf (SmOSO) = -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/ with unit cell parameters = 13.7442 (2), = 4.20178 (4) and = 8.16711 (8)Å, β = 107.224 (1)°, = 450.498 (9)Å, = 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 SmOSOluminescence spectra exhibit three main bands easily assignable to the transitions from G state to H, H, and H multiplets.

摘要

研究了硫化钐在 500-1000°C 温度范围内的氧化过程。我们的 DTA 研究允许确定该过程的主要热力学（∆Hº = -654.6 kJ/mol）和动力学特征（E = 244 kJ/mol，A = 2 × 10）。计算了硫酸氧钐（SmOSO）形成的焓值（ΔHºf (SmOSO) = -2294.0 kJ/mol）。计算出的过程焓值与实验确定的值相符。结果表明，硫酸氧钐结晶具有单斜对称性，其晶体结构属于 C2/空间群，晶胞参数为 = 13.7442 (2), = 4.20178 (4) 和 = 8.16711 (8)Å, β = 107.224 (1)°， = 450.498 (9)Å， = 4。得到了晶体结构的主要元素，并详细分析了阳离子配位环境。振动光谱方法证实了结构模型的合理性。SmOSO 的发光光谱显示了三个容易分配到从 G 态到 H、H 和 H 多重态跃迁的主要带。