Ferromagnetically coupled tetranuclear Ni(<sc>ii</sc>)-2-oxy-aceto- or benzo-phenonate complexes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00617356" target="_blank" >RIV/68081723:_____/25:00617356 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2025/ra/d4ra08700c" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/ra/d4ra08700c</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d4ra08700c" target="_blank" >10.1039/d4ra08700c</a>
Alternative languages
Result language
angličtina
Original language name
Ferromagnetically coupled tetranuclear Ni(<sc>ii</sc>)-2-oxy-aceto- or benzo-phenonate complexes
Original language description
Reaction of 2-hydroxy-acetophenone (HL) or 2-hydroxy-benzophenone (HL ') with nickel(ii) acetate provides the tetrakis-[(mu 3-methanolato-kappa 3O:O:O)(methanol-kappa O)(2-oxyacetophenone-kappa 2O,O ')nickel(ii)], [Ni(L)(mu 3-CH3O)(CH3OH)]4 (1) or tetrakis-[(mu 3-methanolato-kappa 3O:O:O)(aqua-kappa O)(2-oxybenzophenone-kappa 2O,O ')nickel(ii)] monohydrate, [Ni(L ')(mu 3-CH3O)(H2O)]4<middle dot>H2O (2). Molecular structure determination demonstrates each nickel(ii) ion is six-coordinate with a distorted octahedral geometry defined by three oxygen atoms from three methoxide fragments, a methanol (1) or water (2) molecule, and two oxygen atoms from the acetophenonate (L-) or benzophenonate (L '-) ligand, such that the four nickel atoms and four methoxide groups represent a cubane-type structural topology with each methoxide fragment bridging three of the metal centers. Stabilization of the cubane core occurs via intramolecular O-H & ctdot, O hydrogen bonds. Solid-state magnetic measurements along with computational modeling confirm dominant ferromagnetic interactions for the compounds, attributed to their cubane topology and the Ni-O-Ni angles adopting values lower than 100 degrees. Thermogravimetric analysis (TGA) suggests thermal decomposition of the complexes with successive release of the lattice water, coordinated solvents (MeOH or H2O), OCH3 groups and fragmented ligand species, supported by differential scanning calorimetry (DSC) studies. Cyclic voltammetry reveals a quasi-reversible two electrons charge transfer process in N,N-dimethylformamide.
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
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
RSC Advances
ISSN
2046-2069
e-ISSN
2046-2069
Volume of the periodical
15
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
4250-4261
UT code for WoS article
001415328300001
EID of the result in the Scopus database
2-s2.0-85219438578