Synthesis, Structure, and Characterization of Novel Two- and Three-Dimensional Vanadates:  Ba_2.5(VO₂)₃(SeO₃)₄·H₂O and La(VO₂)₃(TeO₆)·3H₂O

Abstract

Two new vanadates, Ba(2.5)(VO2)3(SeO3)4.H2O and La(VO2)3(TeO6).3H2O, have been synthesized by hydrothermal methods using BaCO3, Ba(OH)2.H2O, La(NO3)3.6H2O, V2O5, TeO2, and H2SeO3 as reagents. The structures were determined by single-crystal X-ray diffraction. Ba(2.5)(VO2)3(SeO3)4.H2O exhibits a two-dimensional layered structure consisting of VO(5) square pyramids and SeO3 polyhedra, whereas La(VO2)3(TeO6).3H2O has a three-dimensional framework structure composed of VO(4) tetrahedra and TeO6 octahedra. Infrared and Raman spectroscopy, UV-vis diffuse reflectance spectroscopy, and thermogravimetric analysis are also presented. Crystal data: Ba(2.5)(VO2)3(SeO3)4.H2O, trigonal, space group P (No. 147) with a = b = 12.8279(15) A, c = 7.2631(9) A, V = 1035.1(2) A(3), and Z = 2; La(VO2)3(TeO6).3H2O, trigonal, space group R3c (No. 161) with a = b = 9.4577(16) A, c = 23.455(7) A, V = 1816.9(7) A3, and Z = 6.

Synthesis, Structure, and Characterization of a Layered Mixed Metal Oxychloride, PbVO3Cl

“…The assignments are consistent with those previously reported. 32,33 The thermal behavior of PbVO3Cl was investigated using thermogravimetric analysis (TGA). PbVO3Cl is not stable at high temperature, above 470 o C, and decomposes to a corresponding oxide.…”

[R-C7H16N2][V2Te2O10] and [S-C7H16N2][V2Te2O10]; new polar templated vanadium tellurite enantiomers

“…), which adopt asymmetric geometries in oxide coordination environments owing to secondorder Jahn-Teller distortions [11][12][13]. Vanadium selenites and tellurites have been the focus of recent attention, owing to the presence of multiple asymmetric building units [7,[14][15][16][17][18][19][20][21]. In addition, the metal oxide bonds contained in such compounds exhibit high polarizabilities, and are the suspected sources of the unusually high SHG responses in materials such as KTiOPO 4 (KTP) [22,23] and LiNbO 3 [24].…”

Synthesis and characterization of some oxovanadium(V) complexes with internally functionallized oximes. Crystal and molecular structure of heptacoordinated [VOCl{ON=C(CH3) (C4H3S-2)}2] · CH3OH

“…The applications of oxovanadium complexes as potential molecular precursors for the preparation of organicinorganic hybrid materials [15][16][17][18][19] by sol-gel technology have further stimulated research in this area.…”