Synthesis, structural and magnetic properties of TM2+ 2[MoIV(CN)8]·nH2O

Zuzana Mitróová, Marián Mihalik, Anton Zentko, Mónika Bokor, Katalin Kamarás, Viktor Kavečanský, Jozef Kováč, Kornel Csach, Jarmila Trpčevská

Research output: Contribution to journalArticle

Abstract

Octacyanomolybdates (OCMs) TM2+2[Mo(CN) 8·nH2O, where TM is Mn, Fe, Co, Ni, Cu were synthesised and characterised by IR spectroscopy and UV-VIS spectroscopy. The UV-VIS spectrum showed the intervalence charge transfer (IVCT) band between MoIV-CN-CuII and MoV-CN-CuI around 510 nm. Studied OCMs adopt tetragonal crystal structure. The 1H NMR signals reflect the magnetic moment of the TM2+ ions (μp). The decay rates of free induction decay (FID) signals increase as μp and the applied static rf-field increases. The spin - lattice relaxation times at 27.7 MHz vary from 0.0187 ms (Mn) up to 0.45 ms (Cu). Magnetization measurements indicate long-range magnetic ordering of Mn- and Co- OCMs with the Curie temperature Tc = 4 K. The remaining OCMs (TM is Fe, Ni, Cu) are paramagnetic down to T=1.9 K.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalCeramics - Silikaty
Volume49
Issue number3
Publication statusPublished - Dec 1 2005

Keywords

  • Crystal structure
  • Magnetic properties
  • Nmr spectroscopy
  • Octacyanocomplexes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Ceramics and Composites
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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  • Cite this

    Mitróová, Z., Mihalik, M., Zentko, A., Bokor, M., Kamarás, K., Kavečanský, V., Kováč, J., Csach, K., & Trpčevská, J. (2005). Synthesis, structural and magnetic properties of TM2+ 2[MoIV(CN)8]·nH2O. Ceramics - Silikaty, 49(3), 181-187.