新型二维和三维钒酸盐的合成、结构及表征：Ba2.5(VO2)3(SeO3)4·H2O和La(VO2)3(TeO6)·3H2O

Synthesis, structure, and characterization of novel two- and three-dimensional vanadates: Ba2.5(VO2)3(SeO3)4.H2O and La(VO2)3(TeO6).3H2O.

作者信息

Sivakumar T, Ok Kang Min, Halasyamani P Shiv

机构信息

Department of Chemistry and Center for Materials Chemistry, University of Houston, 136 Fleming Building, Houston, Texas 77204-5003, USA.

出版信息

Inorg Chem. 2006 May 1;45(9):3602-5. doi: 10.1021/ic052103u.

DOI:10.1021/ic052103u

PMID:16634591

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.

摘要

采用水热法，以碳酸钡、氢氧化钡·水、硝酸镧·六水合物、五氧化二钒、二氧化碲和亚硒酸为试剂，合成了两种新的钒酸盐，即Ba(2.5)(VO2)3(SeO3)4·H2O和La(VO2)3(TeO6)·3H2O。通过单晶X射线衍射确定了其结构。Ba(2.5)(VO2)3(SeO3)4·H2O呈现出由VO(5)四方锥和SeO3多面体组成的二维层状结构，而La(VO2)3(TeO6)·3H2O具有由VO(4)四面体和TeO6八面体构成的三维骨架结构。还给出了红外光谱、拉曼光谱、紫外可见漫反射光谱和热重分析。晶体数据：Ba(2.5)(VO2)3(SeO3)4·H2O，三方晶系，空间群P（编号147），a = b = 12.8279(15) Å，c = 7.2631(9) Å，V = 1035.1(2) Å³，Z = 2；La(VO2)3(TeO6)·3H2O，三方晶系，空间群R3c（编号161），a = b = 9.4577(16) Å，c = 23.455(7) Å，V = 1816.9(7) Å³，Z = 6。