CoII molecular square with single-molecule magnet properties

Dayu Wu, Dong Guo, You Song, Wei Huang, Duan Chunying, Qingjin Meng, Osamu Sato

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65 Citations (Scopus)

Abstract

A new tetranuclear cobalt(II) molecular square in which adjacent Co II centers are linked by a μ2-bridging oxygen atom and a N-N bridge along the edges of the square has been designed for single-molecule magnets (SMMs) with high anisotropy barriers. The overall intramolecular ferromagnetic coupling at low temperature combined with the slow relaxation at static zero fields suggests a SMM behavior for this molecular square. The zero-field cooled magnetization (ZFCM) and field cooling magnetization (FCM) at 10 Oe illustrate the nonreversibility and bifurcation below 4.5 K. The deviations of magnetization from the saturated value in strong applied fields demonstrate the participation of low-lying excited states. The peaks of the out-of-phase signals are observed corresponding to coincidence of the applied ac field oscillation frequency with the relaxation rate.

Original languageEnglish
Pages (from-to)854-860
Number of pages7
JournalInorganic chemistry
Volume48
Issue number3
DOIs
Publication statusPublished - Feb 2 2009

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Wu, D., Guo, D., Song, Y., Huang, W., Chunying, D., Meng, Q., & Sato, O. (2009). CoII molecular square with single-molecule magnet properties. Inorganic chemistry, 48(3), 854-860. https://doi.org/10.1021/ic8012188