Selective Pathway toward Heteroleptic Spin-Crossover Iron(II) Complexes with Pyridine-Based N‑Donor Ligands

Авторы: Nikovskiy Igor, Aleshin Dmitry Yu, Novikov Valentin V., Polezhaev Alexander V., Khakina Ekaterina A., Melnikova Elizaveta K., Nelyubina Yulia V.
Журнал: Inorganic Chemistry
Год издания: 2022
Издательство: American Chemical Society
Местоположение издательства: United States
DOI: 10.1021/acs.inorgchem.2c03270
Аннотация: A new synthetic pathway is devised to selectively produce previously elusive heteroleptic iron(II) complexes of terpyridine and N,N′-disubstituted bis(pyrazol-3-yl)pyridines that stabilize the opposite spin states of the metal ion. Such a combination of the ligands in a series of the heteroleptic complexes induces the spin-crossover (SCO) not experienced by the homoleptic complexes of these ligands or shifts it to lower/higher temperatures respective to the SCO-active homoleptic complex. The midpoint temperatures of the resulting SCO span from ca. 200 K to the ambient temperature and beyond the highest temperature accessible by NMR spectroscopy and SQUID magnetometry. The proposed “one-pot” approach is applicable to other N-donor ligands to selectively produce heteroleptic complexes─including those inaccessible by alternative synthetic pathways─with highly tunable SCO behaviors for practical applications in sensing, switching, and multifunctional devices.
Добавил в систему: Никовский Игорь Алексеевич

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