The distinguishing effect of the magnetic states of cobalt on the performance of single-molecule magnet behaviors in closely related CoIIIDyIII and CoIIDyIII complexes

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

The distinguishing effect of the magnetic states of cobalt on the performance of single-molecule magnet behaviors in closely related CoIIIDyIII and CoIIDyIII complexes

Popis výsledku v původním jazyce

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 &apos;, 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.

Název v anglickém jazyce

The distinguishing effect of the magnetic states of cobalt on the performance of single-molecule magnet behaviors in closely related CoIIIDyIII and CoIIDyIII complexes

Popis výsledku anglicky

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 &apos;, 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA23-07175S" target="_blank" >GA23-07175S: Semikoordinace: cesta k chemicky stabilním molekulárním nanomagnetům</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NEW JOURNAL OF CHEMISTRY

ISSN

1144-0546

e-ISSN

1369-9261

Svazek periodika

48

Číslo periodika v rámci svazku

48

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

20410-20422

Kód UT WoS článku

001364000600001

EID výsledku v databázi Scopus

2-s2.0-85210927018