|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Evidence for zero-field slow magnetic relaxation in a Co(ii) complex with a pseudo-tetrahedral N2I2 environment†статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Yureva E.A., Korchagin D.V., Anichkin A.A., Shilov G.V., Babeshkin K.A., Efimov N.N., Palii A.V., Aldoshin S.M.
- Журнал: Dalton Transactions
- Том: 51
- Номер: 31
- Год издания: 2022
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 11916
- Последняя страница: 11921
- DOI: 10.1039/D2DT01336C
- Аннотация: Herein, we report on the synthesis, structure and magnetic properties of a four-coordinate mononuclear Co(ii) diiodide complex with the 3,5-dimethylpyrazole ligand. A distorted tetrahedral local coordination environment around the central cobalt ion is formed by the two nitrogen atoms of two monodentate pyrazole ligands and by iodide ions. Direct current (dc) magnetic measurements in combination with ab initio SA-CASSCF/NEVPT2 quantum-chemical calculations revealed a strong easy-axis-type magnetic anisotropy with a record value Dexp = −30.58(3) cm−1 of the axial zero field splitting parameter for pseudo-tetrahedral Co(ii)-based CoL2Hal2 complexes. Moreover, it is the only complex in this series demonstrating the slow relaxation of magnetization at zero dc field. The Orbach process is shown to be the dominant mechanism of magnetic relaxations in the high temperature range, while the quantum tunneling of magnetization produces the leading contribution to the overall relaxation at temperatures below 4 K.
- Добавил в систему: Юрьева Елена Александровна