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Hydrothermal synthesis, thermal decomposition and optical properties of Fe2F5(H2O)(Htaz)(taz)(Hdma)

AuthorsSmida, Mouna; Lhôste, Jérome; Dammak, Mohamed; García-Granda, Santiago
KeywordsThermal analysis
Mass spectrometry
Issue Date2019
CitationArabian Journal of Chemistry 12: 2519-2523 (2019)
AbstractCrystal structure of Fe2F5(H2O)(Htaz)(taz)(Hdma) which crystallizes in the triclinic sys-tem space group P1 with unit cell parametersa= 8.8392(5) A ̊,b= 9.1948(5) A ̊,c= 9.5877(5) A ̊,a= 82.070(3)°,b= 63.699(3)°,c= 89.202(3)°,Z= 2, andV= 690.91(7) A ̊3, was synthesizedunder hydrothermal conditions at 393 K for 72 h, by a mixture of FeF2/FeF3, 1,2,4-triazole mole-cule (Htaz), and hydrofluoric acid solution (HF 4%) in dimethylformamide solvent (DMF). Themain feature of this material is the coexistence of two oxidation states for iron atoms (Fe2+,Fe3+) in the unit cell, which associate by opposite fluorine corners of FeF5N and FeF2N4octahe-dra, and/or triazole molecule which originates the 2D produces material. The structure determina-tion, performed from single crystal X-ray diffraction data, lead to theR1/WR2reliability factors0.031/0.087. Thermal stability studies (TG/DTG/DTA) show that the decomposition provides inthe temperature range 473–773 K and no mass loss was detected before 473 K. Mass spectrometry(MS) has been used. The optical absorption of the solid was measured at the correspondingkmaxusing UV–vis diffuse-reflectance spectrum.
Publisher version (URL)https://doi.org/10.1016/j.arabjc.2015.04.023
Identifiersdoi: 10.1016/j.arabjc.2015.04.023
issn: 1878-5379
Appears in Collections:(CINN) Artículos
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