Ferrocenyl-substituted nitronyl nitroxide in the design of one-dimensional magnets

Kseniya Maryunina; Daria Nigomedyanova; Vitaly Morozov; Kristina Smirnova; Gleb Letyagin; Galina Romanenko; Nikolay Efimov; Artem Bogomyakov; Victor Ovcharenko

doi:10.1039/d3dt03858k

Ferrocenyl-substituted nitronyl nitroxide in the design of one-dimensional magnets

Dalton Trans. 2024 Jan 23;53(4):1714-1721. doi: 10.1039/d3dt03858k.

Authors

Kseniya Maryunina^{1

2}, Daria Nigomedyanova^{1

2}, Vitaly Morozov¹, Kristina Smirnova^{1

2}, Gleb Letyagin^{1

2}, Galina Romanenko¹, Nikolay Efimov³, Artem Bogomyakov^{1

2}, Victor Ovcharenko¹

Affiliations

¹ International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation. mks@tomo.nsc.ru.
² Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation.
³ N.S. Kurnakov Institute of General and Inorganic Chemistry, RAS, Leninskii Prospekt, 31, 119991 Moscow, Russia.

PMID: 38167942
DOI: 10.1039/d3dt03858k

Abstract

By the reaction of M(hfac)₂ (M = Mn(II), Co(II), Cu(II), and Zn(II); hfac is the hexafluoroacetylacetonate anion) and ferrocenyl-substituted nitronyl nitroxide (L), we succeeded in the synthesis of stable heterospin complexes: mononuclear [Zn(hfac)₂L], trinuclear {[Cu(hfac)₂]₃L₂} and chain polymer [Mn(hfac)₂L]_n and [Co(hfac)₂L]_n. The specific steric bulkiness of the ferrocenyl substituent leads to the formation of trans-type coordination polyhedra in the [Mn(hfac)₂L]_n and [Co(hfac)₂L]_n chains. The introduction of the ferrocene substituent leads to an effective weakening of intermolecular or interchain magnetic exchange coupling. Ferrimagnetic ordering was observed for one-dimensional complexes [M(hfac)₂L]_n (M = Mn(II), Co(II)). [Co(hfac)₂L]_n exhibits features of single-chain magnet behaviour: slow relaxation of magnetization below 13 K is associated with a high coercive field (54 kOe at 2 K).