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 SM ISO690:2012STATI, Dumitru, VAN LEUSEN, Jan, NAUSHAD, Ahmed, KRAVTSOV, Victor, KOGERLER, Paul, BACA, Svetlana. A {CoIII2DyIII4} Single-Molecule Magnet with an Expanded Core Structure. In: Crystal Growth and Design, 2023, vol. 23, pp. 395-402. ISSN 1528-7483. DOI: https://doi.org/10.1021/acs.cgd.2c01085 |
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  Crystal Growth and Design |
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| Volumul 23 / 2023 / ISSN 1528-7483 | ||||||
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| DOI:https://doi.org/10.1021/acs.cgd.2c01085 | ||||||
| Pag. 395-402 | ||||||
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The coordination cluster compound [CoIII2DyIII4(OH)2(ib)8(bdea)2(NO3)4(H2O)2]·2MeCN (1) self-assembles in a high-yield reaction of cobalt(II) isobutyrate (ib) with Dy(NO3)3·6H2O and N-butyldiethanolamine (H2bdea) in air. The Ci-symmetric {CoIII2DyIII4} core fragment features two {CoDy2(μ3-OH)} triangles, joined by one of their Dy sites via μ-O and μ-carboxylate bridges. This results in a flat zigzag metal skeleton, in contrast to previously reported hexanuclear {Co2Ln4(μ3-OH)2} clusters, namely, exhibiting a more condensed combination of two {CoLn2(μ3-OH)} triangles that form a Dy4 rhombus. According to ac susceptibility measurements, this rearrangement in 1 reduces quantum tunneling of the magnetization and hence pushes up the onset of pronounced out-of-phase signals at zero bias field to 14 K, a significant change vs the more condensed {Co2Dy4} structures. As intermolecular interactions between coordination clusters in the solid state are well-known to also influence SMM features, comparative Hirshfeld surface analyses are also presented. |
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| Cuvinte-cheie Carboxylation, Cobalt compounds, Coordination reactions, magnetic susceptibility |
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