(CN₃H₆)₂·(VO₂)₃(PO₄)(HPO₄), a Layered Guanidinium Vanadium(V) Phosphate Related to Hexagonal Tungsten Oxide

Abstract

The hydrothermal synthesis, single-crystal structure, and some physical properties of (CN 3 H 6 ) 2 ‚(VO 2 ) 3 (PO 4 )-(HPO 4 ), a new guanidinium vanadium(V) phosphate, are reported. This phase is built up from vertex-sharing layers of VO 6 octahedra, which adopt the hexagonal tungsten oxide motif. These octahedral layers are capped by P-O and P-OH entities resulting in anionic layers of stoichiometry [(VO) 3 (PO 4 )(HPO 4 )] 2-. Pairs of guanidinium cations are arrayed in the interlayer regions in a manner that suggests interactions may occur between these species. Crystal data consists of the following: (CN 3 H 6 ) 2 ‚(VO 2 ) 3 (PO 4 )(HPO 4 ), monoclinic, C2/c (No. 15), a ) 12.446 (3) Å, b ) 7.287(2) Å, c ) 17.819(5) Å, ) 97.23(3)°, Z ) 4.

Synthesis, structure and luminescence property of two lanthanum phosphite hydrates: La2(H2O)x(HPO3)3 ()

“…In this structure, the face-sharing polyhedral dimer La(1)O 9 -La(2)O 9 is also characteristic as SBU. Dimers share their edges and form a layer including four-membered and eight-membered rings parallel to (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). In the layer, two stagger phosphite tetrahedra cap the four-membered ring on either side.…”

“…During the past decade, a large number of new metal phosphates with open frameworks have appeared in the literature. The metals include Ga [3], In [4,5], Zn [6,7], Fe ( [8] and references therein), Sn ( [9] and references therein), V [10][11][12], Mo [13], Ti [14], Mn [15] and rare-earth elements [16,17]. In the past few years, the pyramidal hydrogen phosphite ion [HPO 3 ] 2À has also been incorporated into the structural framework of these kinds of compounds, giving rise to new purely inorganic [18] or organically templated phases [19].…”

Amine‐Templated One‐Dimensional Metal Sulfates Including a Mixed‐Valent Fe Compound with a Half‐Kagome Structure

“…The 1D chains are arranged parallel to one another, with the diprotonated amine and water molecules residing in the interchain space and forming strong hydrogen bonds with the framework. [13] A The use of dabco as the templating amine has been reported to give rise to the same type of chain [4b] with the VO 4 (OH) 2 octahedra sharing their vertices in an alternating cis-trans fashion.…”

Synthesis and Crystal Structure of Cs(VO2)3(TeO3)2, a New Layered Cesium Vanadium(V) Tellurite

“…The same octahedral arrangement occurs in a single layer of the three-dimensional hexagonal tungsten oxide (HTO, or hex-WO 3 ) structure [9]. In the layered phases, the octahedral sheets are ªcappedº by Se atoms (as pyramidal [ [11] has essentially the same layered structure, with phosphate groups serving to cap the vanadium-oxide layers, and guanidinium cations providing inter-layer charge balance.…”