Single-molecule magnets: [Mn12O12(O 2CCF2Cl)16(H2O)4] 0/-

Hui Lien Tsai, Hong Ann Shiao, Tyn Yih Jwo, Chen I. Yang, Ching Shuei Wur, Gene Hsiang Lee

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Abstract

The syntheses, X-ray crystal structures and magnetic properties of [Mn 12O12(O2CCF2Cl)16(H 2O)4] (1) and [PPh4][Mn12O 12(O2CCF2Cl)16(H2O) 4] (2) are reported. Complex 1·4H2O crystallizes in the tetragonal space group I4̄ at 150(1) K with a = 18.6838(1) Å, c = 13.3829(5) Å, and Z = 2. Reduction of complex 1 with PPh4I in CH2Cl2 leads to isolation of complex 2·2H 2O·CH2Cl2, it crystallizes in the monoclinic space group P21/c at 150(1) K with a = 18.6623(7) Å, b = 13.3626(5) Å, c = 45.4482(17) Å, β = 97.204°, and Z = 4. The results of DC and AC magnetic susceptibility studies are described. DC studies of complexes 1 and 2 in a 1.0 kG field show maxima of the χMT versus T plot in the 5-10 K range at 47.63 and 54.27 emu K mol-1, respectively. Complexes 1 and 2 exhibit out-of-phase component of the AC magnetic susceptibility with frequency dependent maxima. Step-like features are seen on hysteresis loops of complex 1. DC decay relaxation of complex 1 shows quantum tunneling behavior below 2.1 K.

Original languageEnglish
Pages (from-to)2205-2214
Number of pages10
JournalPolyhedron
Volume24
Issue number16-17
DOIs
Publication statusPublished - 2005 Nov 17

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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    Tsai, H. L., Shiao, H. A., Jwo, T. Y., Yang, C. I., Wur, C. S., & Lee, G. H. (2005). Single-molecule magnets: [Mn12O12(O 2CCF2Cl)16(H2O)4] 0/-. Polyhedron, 24(16-17), 2205-2214. https://doi.org/10.1016/j.poly.2005.03.106