Silver Vanadyl(IV) ortho‐Pyrophosphate: Synthesis, Crystal Structure, and Characterization of the (V≡O)2+ Group. Issue 8 (16th April 2018)

• Record Type: Journal Article
• Authors: Wittich, Knut; NejatyJahromy, Yaser; Abdullin, Dinar; Schiemann, Olav; Karpov, Andrey; Dobner, Katharina; Rosowski, Frank; Glaum, Robert
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 644:Issue 8/9(2018)
• Page Start: 424
• Page End: 429
• Publication Date: 2018-04-16
• Subjects: Selective oxidation -- Heterogeneous catalysis -- Vanadyl phosphate -- Solid‐state chemistry -- Solid‐state structures; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201800033
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : Ag6 (V IV O)2 (PO4 )2 (P2 O7 ) was obtained by reaction of Ag3 PO4 and (VO)2 P2 O7 (sealed ampoule, 550 °C, 3 d). The crystal structure of the new mixed ortho‐pyrophosphate was determined from X‐ray single‐crystal data [ Pnma, Z = 4, a = 12.759(3) Å, b = 17.340(4) Å, c = 6.418(1) Å, R1 = 0.071, wR2 = 0.184 for 3174 unique reflections with F o > 4 σ ( F o ), 141 variables]. Ag + ions are located in between layers [(V IV O)2 (PO4 )2 (P2 O7 )] 6– . Equilibrium relations of the new phosphate to neighboring phases were determined. The electronic structure of the (V IV ≡O) 2+ group was investigated by polarized electronic absorption spectroscopy (ν̃1a = 9450 cm –1, ν̃1b = 9950 cm –1, ν̃2 = 14750 cm –1 ), EPR spectroscopy [X‐ and Q‐band, powder and single crystal, orthorhombic crystal g‐tensor with g 1 = 1.9445(3), g 2 = 1.9521(3), g 3 = 1.9695(3)], and magnetic measurements (powder, μ exp / μ B = 1.71, Θ p = –1.7 K). Abstract :