Jump to main content
Jump to site search

Issue 5, 2013
Previous Article Next Article

Assembly of alternating spin-chains with magnetically anisotropic cobalt(II) dimers

Author affiliations

Abstract

A dimeric carboxylato complex of cobalt(II), [Co2II(1,2-chedc)2(Im)2] (1) (1,2-chedc = cyclohex-1-ene-1,2-dicarboxylate and Im = imidazole), has been isolated. This complex can be further linked by chloro- or carboxylato-ligands, affording respectively one-dimensional chain structures of 1[Co2II(μ-Cl)2(1,2-chedc)(Im)2] (2) and 1[CoII(1,2-chedc)(Im)] (3). Compound 1 shows weak antiferromagnetic interactions passing through the body of the dicarboxylate as well as substantial single-ion magnetic anisotropy (zero-field splitting energy Δ = 8.5 cm−1). Both 2 and 3 exhibit typical alternating spin-chain behaviour in the higher-temperature region, but they display disparate behaviours at lower temperatures. For 2, alternating F–AF interactions compete (J1 = 6.7 K and J2 = −8.2 K), resulting in paramagnet-like behaviour with no clear evidence of three-dimensional contact. Compound 3 exhibits stronger intrachain AF–AF exchange-coupling interactions (J1 = −9.3 K and J2 = −4.3 K), leading to non-diamagnetic ground state due to the tiling of adjacent spins. Long-range magnetic ordering was observed below 10 K. Its narrow hysteresis loop suggests the use of 3 as a soft magnet.

Graphical abstract: Assembly of alternating spin-chains with magnetically anisotropic cobalt(ii) dimers

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 05 Oct 2012, accepted on 27 Oct 2012 and first published on 29 Oct 2012


Article type: Paper
DOI: 10.1039/C2DT32362A
Citation: Dalton Trans., 2013,42, 1770-1777
  •   Request permissions

    Assembly of alternating spin-chains with magnetically anisotropic cobalt(II) dimers

    Y. Zheng, L. Qin, Z. Zheng, W. Xue and X. Chen, Dalton Trans., 2013, 42, 1770
    DOI: 10.1039/C2DT32362A

Search articles by author