ChemInform Abstract: Cyclic Tungstoselenites Based on {Se₂W₁₂} Units.

Abstract

Cyclic Tungstoselenites Based on {Se2W12} Units. -Compounds (III) and (V) are characterized by single crystal XRD, 77 Se NMR, FTIR, and Raman spectroscopy. (III) contains the novel macrocyclic anion [{(Se2W12O46)WO(H2O)}3] 24consisting of three Se2W12 fragments, which are connected via three WO(H2O) 4+ groups. The same Se2W12 building block is present in the structure of (V). The hydration numbers of (III) and (V) determined by XRD differ from those determined by thermal and elemental analysis. Na 24 [H 6 Se 6 W 39 O 144 ]·61.25H 2 O and K 2 Na 22 [H 6 Se 6 W 39 O 144 ]·57.75H 2 O (obtained by introduction of some KCl into the mother liquor) crystallize in the triclinic space group P1 with Z = 2. Na13[{Mn2Cl(H2O)2}{Mn(H2O)2}2 (Se2W12O46)2(SeO)2]·51H2O crystallizes in P1 with Z = 1. -(KALININA*, I. V.; PERESYPKINA, E. V.; IZAROVA, N. V.; NKALA, F. M.; KORTZ, U.; KOMPANKOV, N. B.; MOROZ, N. K.; SOKOLOV, M. N.; Inorg. Chem. 53 (2014) 4, 2076-2082, http://dx.

183W Nuclear Magnetic Resonance and Photocatalysis Studies of Two Ruthenium-Decorated Isopolyoxometalates {Ru2W10} and {Ru2W13} via pH-Induced Assemblies

“…Every Ru atom inside favored a distorted octahedron consisting exclusively of bridging oxo ligands, and the Ru−O distances ranging from 1.763 to 2.050 (10) Å are comparable to the corresponding distances in the Ru IV -containing polyanions. [26][27][28][29][30]51 The BVS calculations also gave BVS values of 4.114−4.250 for Ru(IV) and 5.957−6.201 for all W(VI) atoms (Table S5). Within the {W 8 } building block (Figure 1f), four WO 6 octahedra were connected via edges leading to a {W 4 } semicircle; then, these two {W 4 } fragments were further connected via two corners to form the {W 8 } ring.…”

Organic Hybrid Antimoniotungstate Layered Ionic Crystal: Synthesis, Structure, and Interlayer-Confined Proton Conduction

“…Similarly, Krebs and co-workers have reported the [Sb 2 W 22 O 74 (OH) 2 ] 12− comprising two {β-SbW 9 O 33 } 9− units linked by a belt of two {WO 2 } 2+ and two {WO 2 (OH)} + groups. 15 Then, a series of such sandwich tungsten clusters, like [Bi 2 W 2 2 O 7 4 (OH) 2 ] 1 2 − , 1 6 [ T e 2 W 2 0 O 7 0 ( R u C 6 H 6 ) 2 ] 8 − , 1 7 a n d 18 were also reported (Figure S1). Step two, polyanion 1 assembled into the Na 5.5 H 6.5 •1•36H 2 O rod-like ionic crystal with layered structure through the Na-bridged sheet and hydrogen-bonded layers.…”

A Hexameric Ruthenium(III)-Containing Tungstoantimonate with Good Proton Conductivity Performance

“…With that, it was concluded the proton transport process of compound 1 is supported by a Grotthus mechanism for its E a residing in the range of 0.1−0.4 eV. 31 Several proton conductivity studies have been reported recently in the field of POMs, such as {[W 14 Ce IV 6 O 61 ]-…”

“…In addition, most of the related studies focused on POMs built from 3d block transition metals and lanthanide elements, while rare studies were conducted on 4d block transition metal-based POMs in this field. 31 and Niu group reported an organic hybrid antim o n i o t u n g s t a t e l a y e r e d i o n i c c r y s t a l Na 5.5 H 6.5 [(SbW 9 O 33 ) 2 {WO 2 (OH)} 2 {WO 2 }RuC 7 H 3 NO 4 ]• 36H 2 O with high proton conductivity in 2023. 32 Here we reported a new hexamer Na The proton conductivity of compound 1 was explored and showed a decent performance of reaching 5.41 × 10 −3 S cm −1 at 333 K and 55% relative humidity (RH), as per the Grotthus mechanism.…”