Jump to main content
Jump to site search

Issue 22, 2018
Previous Article Next Article

Targeted replacement: systematic studies of dodecanuclear {MIII6LnIII6} coordination clusters (M = Cr, Co; Ln = Dy, Y)

Author affiliations

Abstract

Three dodecanuclear 3d–4f coordination clusters, [CrIII6LnIII63-OH)8(tbdea)6(C6H5COO)16]·2H2O (Ln = Dy (1), Y (2)) and [CoIII6DyIII63-OH)8(nbdea)6(m-CH3C6H4COO)16]·2H2O·2CH3CN (3), have been synthesized under solvothermal conditions and characterized. Single-crystal X-ray diffraction analysis revealed that all three compounds possess an analogous {MIII6LnIII6} core (M = Cr, Co; Ln = Dy, Y) and dc magnetic susceptibility studies indicated that the magnetic exchange couplings between DyIII ions are dominant antiferromagnetic, while the CrIII–DyIII interactions are weakly ferromagnetic. Furthermore, the ac magnetic susceptibility measurements showed that both CrIII6DyIII6 compound 1 and CoIIi6DyIII6 compound 3 containing highly anisotropic DyIII ions displayed single-molecule magnetic (SMM) behavior with the energy barrier Ueff increasing from 12.8 K (for 1) to 20.8 K (for 3), indicating that weak 3d–4f exchange couplings enhance the QTM and reduce the energy barrier.

Graphical abstract: Targeted replacement: systematic studies of dodecanuclear {MIII6LnIII6} coordination clusters (M = Cr, Co; Ln = Dy, Y)

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Apr 2018, accepted on 30 Apr 2018 and first published on 02 May 2018


Article type: Paper
DOI: 10.1039/C8DT01289J
Citation: Dalton Trans., 2018,47, 7456-7462
  •   Request permissions

    Targeted replacement: systematic studies of dodecanuclear {MIII6LnIII6} coordination clusters (M = Cr, Co; Ln = Dy, Y)

    S. Chen, V. Mereacre, Z. Zhao, W. Zhang, M. Zhang and Z. He, Dalton Trans., 2018, 47, 7456
    DOI: 10.1039/C8DT01289J

Search articles by author

Spotlight

Advertisements