Europium (II) Sulfate EuSO4: Synthesis Methods, Crystal and Electronic Structure, Luminescence Properties. Issue 12 (15th March 2022)

• Record Type: Journal Article
• Authors: Denisenko, Yuriy G.; Sedykh, Alexander E.; Oreshonkov, Aleksandr S.; Molokeev, Maxim S.; Azarapin, Nikita O.; Sal'nikova, Elena I.; Chimitova, Olga D.; Andreev, Oleg V.; Razumkova, Illaria A.; Müller‐Buschbaum, Klaus
• Is Part Of: European journal of inorganic chemistry. Volume 2022:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-15
• Subjects: Europium -- Inorganic synthesis -- Luminescence -- Structure elucidation -- Sulfates; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.202200043
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: In the present work, we report on the synthesis of EuSO4 powders by two different methods using EuS as starting material. The compound EuSO4 contains divalent europium and crystallizes in the orthorhombic crystal system, space group P nma with parameters close to SrSO4 . The compound exhibits near isotropic thermal expansion over the temperature range 300–700 K. EuSO4 was examined by Raman, Fourier‐transform infrared absorption and luminescence spectroscopy methods. EuSO4 is found to be an indirect bandgap material with a bandgap close to direct electronic transition. The emission lifetime of divalent europium d‐f emission in EuSO4 shows an unusual behavior for stoichiometric compounds, as it shortens upon cooling from 1.11(1) μs at room temperature to 0.44(1) μs at 77 K. Abstract : Efficient methods for the synthesis of europium (II) sulfate in various dimensional states based on exchange reactions have been developed. The crystal structure of the compound is determined and its relationship with the main thermochemical and optical properties is shown.