Formation of Defect-Dicubane-Type Ni II 2 Ln III 2 (Ln = Tb, Er) Clusters: Crystal Structures and Modeling of the Magnetic Properties

You, Zhonglu; Prsa, Krunoslav; Mutschler, Julius; Herringer, Susan N.; Wang, Jiaqi; Luo, Yingying; Zheng, Boyang; Decurtins, Silvio; Krämer, Karl; Waldmann, Oliver; Liu, Shi-Xia (2021). Formation of Defect-Dicubane-Type Ni II 2 Ln III 2 (Ln = Tb, Er) Clusters: Crystal Structures and Modeling of the Magnetic Properties. ACS Omega, 6(1), pp. 483-491. American Chemical Society 10.1021/acsomega.0c04930

[img]
Preview
Text
acsomega.0c04930.pdf - Published Version
Available under License Creative Commons: Attribution-Noncommercial-No Derivative Works (CC-BY-NC-ND).

Download (2MB) | Preview

In the field of molecular nanoclusters, cubane and defect-dicubane, or butterfly structures, are typical examples of tetranuclear metal core architectures. In this work, a halogenated and anionic Schiff-base ligand (L2–) is utilized as it is predisposed to chelate within a cluster core to both 3d and 4f metal ions, in different binding configurations (H2L = 4-chloro-2-(2-hydroxy-3-methoxybenzyliden amino)phenol). The phenolate oxygen atoms of the deprotonated ligand can act in μ-O and μ3-O bridging binding modes for the intramolecular assembly of metal ions. Based on that, two tetranuclear and isostructural compounds [Ni2Tb2(L)4(NO3)2(DMF)2]·2CH3CN (1) and [Ni2Er2(L)4(NO3)2(DMF)2]·0.5CH3CN (2) were synthesized and structurally characterized. Magnetic susceptibility and magnetization data indicate the occurrence of dominant intramolecular ferromagnetic interactions between the spin centers. Particular emphasis is given to the theoretical description of the magnetic behavior, taking into account the Ln–Ni and Ni–Ni coupling paths and the magnetic anisotropy of the LnIII and NiII ions. The study is distinguished for its discussion of two distinct models, whereby model A relies on the uniaxial B20 Stevens term describing the lanthanide anisotropy and model B is based on point-charge model calculations. Importantly, the physical meaning of the obtained parameters for both models was critically scrutinized.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)
08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science

UniBE Contributor:

Decurtins, Silvio; Krämer, Karl and Liu, Shi-Xia

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

2470-1343

Publisher:

American Chemical Society

Language:

English

Submitter:

Silvio Decurtins

Date Deposited:

20 Jan 2021 09:17

Last Modified:

20 Jan 2021 09:25

Publisher DOI:

10.1021/acsomega.0c04930

BORIS DOI:

10.7892/boris.150080

URI:

https://boris.unibe.ch/id/eprint/150080

Actions (login required)

Edit item Edit item
Provide Feedback