Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73615115" target="_blank" >RIV/61989592:15310/22:73615115 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/22:PU144126

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/15/3/1064" target="_blank" >https://www.mdpi.com/1996-1944/15/3/1064</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma15031064" target="_blank" >10.3390/ma15031064</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets

Popis výsledku v původním jazyce

By simple reactions involving various cobalt(II) carboxylates (acetate and in situ prepared pivalate and 4-hydroxybenzoate salts) and neocuproine (neo), we were able to prepare three different carboxylate complexes with the general formula [Co(neo)(RCOO)(2)] (R = -CH3 for 1, (CH3)(3)C- for 2, and 4OH-C4H6- for 3). The [Co(neo)(RCOO)(2)] molecules in the crystal structures of 1-3 adopt a rather distorted coordination environment, with the largest trigonal distortion observed for 1, whereas 2 and 3 are similarly distorted from ideal octahedral geometry. The combined theoretical and experimental investigations of magnetic properties revealed that the spin Hamiltonian formalism was not a valid approach and the L-S Hamiltonian had to be used to reveal very large magnetic anisotropies for 1-3. The measurements of AC susceptibility showed that all three compounds exhibited slow-relaxation of magnetization in a weak external static magnetic field, and thus can be classified as field-induced single-ion magnets. It is noteworthy that 1 also exhibits a weak AC signal in a zero-external magnetic field.

Název v anglickém jazyce

Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets

Popis výsledku anglicky

By simple reactions involving various cobalt(II) carboxylates (acetate and in situ prepared pivalate and 4-hydroxybenzoate salts) and neocuproine (neo), we were able to prepare three different carboxylate complexes with the general formula [Co(neo)(RCOO)(2)] (R = -CH3 for 1, (CH3)(3)C- for 2, and 4OH-C4H6- for 3). The [Co(neo)(RCOO)(2)] molecules in the crystal structures of 1-3 adopt a rather distorted coordination environment, with the largest trigonal distortion observed for 1, whereas 2 and 3 are similarly distorted from ideal octahedral geometry. The combined theoretical and experimental investigations of magnetic properties revealed that the spin Hamiltonian formalism was not a valid approach and the L-S Hamiltonian had to be used to reveal very large magnetic anisotropies for 1-3. The measurements of AC susceptibility showed that all three compounds exhibited slow-relaxation of magnetization in a weak external static magnetic field, and thus can be classified as field-induced single-ion magnets. It is noteworthy that 1 also exhibits a weak AC signal in a zero-external magnetic field.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

1996-1944

Svazek periodika

15

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

"1064-1"-"1064-15"

Kód UT WoS článku

000754839600001

EID výsledku v databázi Scopus

2-s2.0-85123615047