Syntheses and crystal structures of new vanadium(IV) oxyphosphates M(VO)2(PO4)2 with M=Co, Ni

Chemical Vapor Transport Synthesis of Cu(VO)2(AsO4)2 With Two Distinct Spin-1/2 Magnetic Ions

“…In Cu­(VO) 2 (PO 4 ) 2 , the VO 6 octahedra are linked via common corners only ( [1+4+1] V 4+ - t O V - [1+4+1] V 4+ ) and form single chains (Figure b). Similar chains are observed in α,β-Co­(VO) 2 (PO 4 ) 2 , (Figure c,d), Ca­(VO) 2 (PO 4 ) 2 (Figure e), and β-Sr­(VO) 2 (AsO 4 ) 2 (Figure f). The latter is characterized by the [1+4+1] V 4+ - V O eq - [1+4+1] V 4+ linkage.…”

“…The interaction of As and V cations in copper­(II) minerals, as a rule, is determined by complementary isomorphic substitutions at the positions of tetrahedral centers of [T 5+ O 4 ] polyhedra, e.g., aleutite Cu 5 O 2 (AsO 4 )­(VO 4 )·(Cu 0.5 □ 0.5 )­Cl and coparsite Cu 4 O 2 [(As,V)­O 4 ]­Cl . The family of M 2+ (VO) 2 (TO 4 ) 2 (M = Ca, Co, Ni, Cu, Sr, Cd, Ba, Pb; T = P, As) compounds includes dozens of different representatives with rich polymorphism (Table S1): Cu­(VO) 2 (PO 4 ) 2 , α,β-Ni­(VO) 2 (PO 4 ) 2 , α,β-Co­(VO) 2 (PO 4 ) 2 , α,β-Sr­(VO) 2 (AsO 4 ) 2 , , Ba­(VO) 2 (AsO 4 ) 2 , Ba­(VO) 2 (PO 4 ) 2 , Ca­(VO) 2 (PO 4 ) 2 , Sr­(VO) 2 (PO 4 ) 2 , Cd­(VO) 2 (PO 4 ) 2 , and Pb­(VO) 2 (PO 4 ) 2 . Structural features of the M 2+ (VO) 2 (TO 4 ) 2 family have not been discussed to date.…”

A highly-thermostable 3D CdII coordination framework based on a new 1,2,4-triazole derivatives: crystal structure, topology and luminescence

“…The Cd1 center displays a distorted octahedral coordination geometry by coordination with five nitrogen atoms from three L 2− ligands and one aqua oxygen, while Cd2 center is also coordinated by five nitrogen atoms from three L 2− ligands and one aqua oxygen but in an uncommon distorted triangular antiprism [CdN5O] geometry. The Cd-N and Cd-O bond lengths vary from 2.239(4) to 2.444(4) Å, and the N-Cd-N and O-Cd-N are in the range of 72.3(1)−67.9(2)° (Table S1), thus being in the normal range observed in other compound [16,17].…”

“…The Cd1 center displays a distorted octahedral coordination geometry by coordination with five nitrogen atoms from three L 2− ligands and one aqua oxygen, while Cd2 center is also coordinated by five nitrogen atoms from three L 2− ligands and one aqua oxygen but in an uncommon distorted triangular antiprism [CdN5O] geometry. The Cd-N and Cd-O bond lengths vary from 2.239(4) to 2.444(4) Å, and the N-Cd-N and O-Cd-N are in the range of 72.3(1)−67.9(2)° (Table S1), thus being in the normal range observed in other compound [16,17].As shown in Scheme 1, in compound 1, the two crystallographically independent L 2− ligands exhibit two different conformations due to the C triazole -C triazole rotation flexibility. One (named L1 2− ) adopts the μ 3 -η 1 N1 :η 1 N2 :η 1 N3 :η 1 N6 :η 1 N7 coordination mode to bridge three centers (1Cd1 + 2Cd2), resulting in two five-membered and one six-membered…”

Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐dimensional Vanadium‐Nickel Phosphate (C2H10N2)4[H2Ni(H2O)2(VO)8(OH)4(PO4)8]·H2O

“…[9] So far, a variety of vanadium phosphates with 1D chain, [10,11] 2D layer, [12,13] and 3D open framework structures were prepared. [14][15][16] It is well known that the addition of both transition metal units and organic group into the skeleton of hybrid material lead to the formation of threedimensional framework compounds, [17] which may generate a new class of mixed-metal clusters with novel structures and useful properties. [18] Furthermore, regarding to the vanadium phosphate oxides system, there are few compounds containing both transition metal units and organic group in their skeleton, notable example compounds include [H 3 N(CH 2 ) 2 4 .…”