A {CoIII2DyIII4} Single-Molecule Magnet with an Expanded Core Structure

Stati, Dumitru and van Leusen, Jan and Ahmed, Naushad and Kravtsov, Victor Ch. and Kögerler, Paul and Baca, Svetlana G. (2022) A {CoIII2DyIII4} Single-Molecule Magnet with an Expanded Core Structure. Crystal Growth & Design. pp. 1-8. ISSN 1528-7483

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Abstract

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. © 2022 American Chemical Society.

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IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Additional Information:

The authors from Chisinau acknowledge the financial support from the State Program of R. Moldova (project ANCD 20.80009.5007.15). S.G.B. is grateful to the Alexander von Humboldt Foundation for Georg Forster Research Award. N.A. is thankful to DST-SERB (File no. PDF/2020/000074), India, for a national postdoctoral fellowship.

Uncontrolled Keywords:

Ac-susceptibility measurements; Cluster compounds; Coordination clusters; Core structure; Higher yield; Metal skeletons; Quantum tunneling; Self-assemble; Single-molecule magnet; Symmetrics

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

Ms Palak Jain

Date Deposited:

19 May 2023 11:58

Last Modified:

19 May 2023 11:58

URI:

http://raiithold.iith.ac.in/id/eprint/11503