Crystal Chemistry of Novel Complex Vanadium Oxides with Layered Structures.

Synthesis, Structure, and Characterization of Novel Two- and Three-Dimensional Vanadates: Ba2.5(VO2)3(SeO3)4·H2O and La(VO2)3(TeO6)·3H2O

“…Vanadium-based oxides have been attracted considerable attention not only because of the structural versatility − of vanadium but also their ability to act as intercalation, − ion-exchange, sorption, magnetic, − and cathode , materials. In vanadates, vanadium has been observed in three-, four-, five-, and six-coordinate environments. − , Although vanadium has readily accessible oxidation states, from +2 to +5, tetra- or pentavalent vanadium is observed in the majority of compounds synthesized by hydrothermal reactions. − In this paper, we report on the hydrothermal synthesis, crystal structure, and characterization of two new vanadates containing not only the tetrahedral or square pyramidal coordination of vanadium with cis -dioxovanadium(V) ((V 5+ O 2 ) + vanadyl) moiety but also with different dimensionalities, two-dimensional Ba 2.5 (VO 2 ) 3 (SeO 3 ) 4 ·H 2 O and three-dimensional La(VO 2 ) 3 (TeO 6 )·3H 2 O.…”

Proposal of New Fabrication Method for Metal Nano-dots

“…Especially, nano-dots are expected, now in the nano-materials. There are some production methods of nano-dots, such as Inert gas evaporation method [1][2][3][4][5][6] , Hydrothermal synthesis method [7][8][9][10][11][12][13] , Mechanical grinding method [14][15][16][17][18][19][20] , Microwave-Induced Plasma in Liquid method [21][22][23][24][25][26][27] .…”

Synthesis and structure of A4V6[Te24+Te6+]O24 (A = K, Rb)—two new quaternary mixed-valent tellurium oxides

“…[8][9][10][11][12] Most of the vanadate compounds are synthesized by conventional solid state techniques or hydrothermal reactions. [13][14][15][16][17][18][19][20][21][22][23][24] Various polyvanadates can be obtained by controlling the reaction conditions such as pH, concentration, temperature and length of time. Among the vanadate compounds, the system A-V(V)-Te-O (where A stands for alkaline or alkaline-earth elements) is of current interest because they often adopt various unusual structures when vanadium is found with tellurium.…”