Mild hydrothermal synthesis of Cu(SeO(3)).2H(2)O: structural characterization, thermal, spectroscopic and magnetic studies

Spectrochim Acta A Mol Biomol Spectrosc. 2009 Mar;72(2):356-60. doi: 10.1016/j.saa.2008.10.032. Epub 2008 Nov 6.

Abstract

Cu(SeO(3)).2H(2)O has been synthesized by hydrothermal technique under autogeneous pressure. The compound crystallizes in the P2(1)2(1)2(1) orthorhombic space group. The unit cell parameters are a=6.672(1), b=9.167(1) and c=7.372(1) A with Z=4. The crystal structure has been refined using the Rietveld method. The limit of thermal stability is 130 degrees C, temperature at which the water content is lost. Above 470 degrees C the compound decomposes in SeO(2)(g) and CuO(s). The IR spectrum shows the characteristic bands of the (SeO(3))(2-) oxoanion and water molecules. An intense absorption band characteristic of Cu(II) cations in five-coordination is observed in the diffuse reflectance spectrum. The ESR spectra are isotropic from room temperature to 4.2K, with g=2.13(1). Magnetic measurements confirm the existence of a global antiferromagnetic behavior with a spin canting phenomenon detected at, approximately, 30K.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Copper / chemistry*
  • Electrochemistry
  • Magnetics
  • Models, Molecular
  • Molecular Structure
  • Selenium / chemistry*
  • Spectrum Analysis
  • Temperature
  • Water / chemistry*

Substances

  • Water
  • Copper
  • Selenium