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Ferromagnetic interactions in EO-azido-bridged binuclear transition metal(II) systems: Syntheses, crystal structures and magnetostructural correlations

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  • Special Topic · Molecular Magnetism
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Abstract

Three new isostructural binuclear transition metal complexes with azido ion and 1,2-bis(3-(pyridin-2-yl)-1H-pyrazol-1-yl)ethane (bppe), formulated as [M2(N3)2(bppe)2](ClO4)2 (M = Co, 1; Ni, 2; Cu, 3), were successfully synthesized. They were structurally and magnetically characterized. In 1–3, the double azido ions link two adjacent octahedral metal centers together in the end-to-on mode (EO), with the M-NEO-M angles of 99.41°, 100.24° and 99.80°, respectively. The co-ligand bppe acts as terminal ligand to saturate the remaining coordination sites. The magnetic properties of 1–3 have been investigated in the temperature range of 2–300 K. Fitting of the magnetic susceptibility data revealed the occurrence of the strong ferromagnetic interactions [J = 26.32 cm−1 (1), J = 38.23 cm−1 (2) and J = 139.83 cm−1 (3)]. Density functional theory calculations have been performed on 1–3 to provide a magneto-structural correlation of the ferromagnetic behavior.

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Authors and Affiliations

  1. Key Laboratory of Advanced Energy Materials Chemistry (MOE); Department of Chemistry, Nankai University, Tianjin, 300071, China

    ShiYuan Zhang, Na Xu, Wei Shi & Peng Cheng

  2. Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China

    BingWu Wang, Wei Shi, Song Gao & Peng Cheng

  3. State Key Lab of Rare Earth Materials Chemistry and Applications; College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China

    BingWu Wang & Song Gao

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  1. ShiYuan Zhang
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  2. BingWu Wang
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  3. Na Xu
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  4. Wei Shi
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  5. Song Gao
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Correspondence to BingWu Wang or Wei Shi.

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Zhang, S., Wang, B., Xu, N. et al. Ferromagnetic interactions in EO-azido-bridged binuclear transition metal(II) systems: Syntheses, crystal structures and magnetostructural correlations. Sci. China Chem. 55, 942–950 (2012). https://doi.org/10.1007/s11426-012-4562-5

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  • DOI: https://doi.org/10.1007/s11426-012-4562-5

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