The distinguishing effect of the magnetic states of cobalt on the performance of single-molecule magnet behaviors in closely related CoIIIDyIII and CoIIDyIII complexes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73627719" target="_blank" >RIV/61989592:15310/24:73627719 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2024/nj/d4nj03979c" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2024/nj/d4nj03979c</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d4nj03979c" target="_blank" >10.1039/d4nj03979c</a>
Alternative languages
Result language
angličtina
Original language name
The distinguishing effect of the magnetic states of cobalt on the performance of single-molecule magnet behaviors in closely related CoIIIDyIII and CoIIDyIII complexes
Original language description
This report details the synthesis and characterization of heterobimetallic 3d-4f complexes, labeled as 1 and 2, utilizing a new Schiff base ligand derived from the condensation of 2-aminobenzyl alcohol with a methyl-substituted o-vanillin. A comprehensive structural analysis reveals that complex 1 comprises a CoIII-DyIII assembly, bridged by two alkoxide groups, in which the CoIII center adopts an octahedral geometry, and the DyIII ion is situated within a DyO9 coordination sphere. Under nearly identical reaction conditions, an intramolecular nucleophilic attack led to a subtle modification of approximately one-half of the ligand from H2L to HL ', resulting in the isolation of complex 2. This complex features a CoII-DyIII core, bridged by a pivalate ion along with phenoxide groups. To the best of our knowledge, this is a rare instance of dinuclear Co-Dy systems exhibiting variable oxidation states of the cobalt center within a similar ligand framework. Both complexes 1 and 2 exhibit field-induced slow relaxation of magnetization, and theoretical analysis revealed that in complex 1, the principal magnetic axis aligns with the shortest Dy-O bond, underscoring the charge polarization effect exerted by the diamagnetic CoIII ion in tuning the crystal field around the DyIII ion, thereby influencing its magnetic anisotropy. Conversely, in complex 2, the ferromagnetic interaction between the CoII and DyIII ions significantly reduces quantum tunneling of magnetization (QTM). Additionally, we employed quantum theory of atoms in molecules (QT-AIM) calculations to investigate the nature of the coordination bonds in these 3d-4f complexes, which provided insights into the crystal field strength around the LnIII ions and their subsequent magnetic anisotropy. This study broadens the exploration of Schiff base-derived 3d-4f complexes and their magnetic properties, highlighting the potential for further advancements in this field.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA23-07175S" target="_blank" >GA23-07175S: Semicoordination: a route to chemically stable molecular nanomagnets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NEW JOURNAL OF CHEMISTRY
ISSN
1144-0546
e-ISSN
1369-9261
Volume of the periodical
48
Issue of the periodical within the volume
48
Country of publishing house
GB - UNITED KINGDOM
Number of pages
13
Pages from-to
20410-20422
UT code for WoS article
001364000600001
EID of the result in the Scopus database
2-s2.0-85210927018