Raman spectroscopy evidence of 1:1:1 complex formation during dissolution of WO3 in a melt of K2S2O7:K2SO4 |
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| Institution: | 1. Department of Chemistry, The Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Lyngby, Denmark;2. Facultat de Química, University of Rovira i Virgili, Tarragona 43007, Spain;1. Department of Physics, SCE⬝Shamoon College of Engineering, Beer-Sheva 84100, Israel;2. Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel;3. Department of Medicine, University of Virginia, Charlottesville, VA 22901, USA;4. Surgery B Department, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University, Beer-Sheva 84101, Israel;1. Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland;2. Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Krakow, Poland;3. Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 449-791, Republic of Korea;1. Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, Via Vetoio 2, 67100, Coppito, L’Aquila, Italy;2. Sorbonne Universities, UPMC, Laboratoire de Réactivité de Surface UMR CNRS 7197, Tour 43-53, 3rd floor, 4 Pl. Jussieu, 75005, Paris, France;3. Service de Bioénergétique, Biologie Structurale et Mécanismes (SB2SM) CEA, iBiTec-S, Biochimie Biophysique et Biologie Structurale (B3S), I2BC, UMR 9198, F-91191 Gif-sur-Yvette, France |
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| Abstract: | Highly inert yellow solid WO3 was found to be soluble in considerable amounts in molten K2S2O7 at elevated temperatures (∼650 °C), if only similar molar amounts of sulfates were also present. The dissolution reaction of WO3 into a melt consisting of a 1:1 molar mixture of K2S2O7 and K2SO4 was studied in detail, and Raman spectroscopy was used to characterize the products. In combination with single crystal X-ray crystal structure determination, it was shown that a new dimeric compound, K8{WVIO2(SO4)2}2(μ-SO4)2], was formed and its assigned Raman spectrum at room temperature is given. The WO22+ cores of the dimeric complex have their symmetrical and antisymmetrical stretching modes ν1(WO22+) and ν3(WO22+) at around 1054 (strong) and 1042 (weak), and the bending mode ν2(WO22+) at around 292 (medium intensity), respectively (positions given in cm−1). |
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