Hydrothermal Syntheses and Structures of Three-Dimensional Oxo-fluorovanadium Phosphates: [H2N(C2H4)2NH2]0.5[(VO)4V(HPO4)2(PO4)2F2(H2O)4] · 2H2O and K2[(VO)3(PO4)2F2(H2O)] · H2O

Open-Framework Inorganic Materials

“…A good list of references to the corresponding works can be found in ref. [167]. As with the condensed molybdenum phosphates, several situations occur for the vanadium subnetwork: isolated polyhedra and corner-and edge-sharing chains (these are connected to each other by [PO 4 ] tetrahedra, but their connections always leave small tunnels inside which cationic exchange is difficult).…”

“…The three-dimensional network generated by corner sharing of these trimers exhibits 10-rings in which diprotonated amines are inserted. Two new vanadofluorophosphates have recently been reported; [167] one is mixed valence V III /V IV while the other contains only V IV .…”

Hydrothermal synthesis and characterization of a new 3D vanadium(III) phosphite (C4H8N2H4)0.5(C4H8N2H3)[V4(HPO3)7(H2O)3]1.5H2O

“…The piperazine has been used as the organic template in the synthesis of vanadium phosphates [6][7]9,19], most of which have 2D layered structures. To our best knowledge, only two examples of 3D piperazine templated vanadium phosphates have been described previously [17,37]. The negative charge of network is compensated by protonated piperazines in the ctystal lattice.…”

“…Hydrothermal synthesis has been successful for the preparation of microporous materials and other important solids. A variety of 1D chain [1][2][3][4], 2D layer [1,[5][6][7][8][9], and 3D open-framework structure [10][11][12][13][14][15][16][17][18][19][20][21][22][23] vanadium phosphates were prepared in the presence of organic amine, and alkali metal cation or metal complex as structure-directing agents. It is interesting that [HN(CH 2 CH 2 ) 3 3 ] 2À unit may lead to novel connectivity patterns compared to those observed in vanadium phosphates containing tetrahedral PO 4 units.…”

Hydrothermal synthesis and structure of a two-dimensional bimetallic copper–molybdophosphonate, [{Cu4(H2O)2(phenbisterpy)2(HO3P(CH2)4PO3H)}(Mo4FO12)2{O3P(CH2)4PO3}]·4H2O, constructed from {Mo4FO12}1− clusters and copper-ligand chains (phenbisterpy=1,4-bis(2,2′:6′,2′′-terpyridin-4′-yl)benzene)

“…It is noteworthy that under the hydrothermal conditions of synthesis, HF is commonly introduced as a solubilizing reagent. While the fluoride is intended to be a spectator ion, incorporation to provide metal oxyfluoride species has been observed, generally for the vanadate phases [33][34][35][36][37][38][39][40][41][42][43]. Molybdenum oxyfluoride clusters are much less common, although [ The title compound was prepared from the hydrothermal reaction of Cu(CH 3 CO 2 ) 2 ÁH 2 O, MoO 3 , 1,4-butylenediphosphonic acid, and 1,4-bis(2,2 0 :6 0 ,2 00 -terpyridin-4 0 -yl)benzene in the presence of HF [50].…”