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Magnetism, Conductivity and Spin-Spin Interactions in Layered Hybrid Structure of Anionic Radicals [Ni(dmit) 2 ] Alternated by Iron(III) Spin-Crossover Complex [Fe(III)(3-OMe-Sal 2 trien)] and Ferric Moiety Precursors

Shvachko, Yuri N ; Spitsyna, Nataliya G ; Starichenko, Denis V ; Zverev, Vladimir N ; Zorina, Leokadiya V ; Simonov, Sergey V ; Blagov, Maksim A ; Yagubskii, Eduard B

Molecules (Basel, Switzerland), 2020-10, Vol.25 (21), p.4922 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
Magnetism, Conductivity and Spin-Spin Interactions in Layered Hybrid Structure of Anionic Radicals [Ni(dmit) 2 ] Alternated by Iron(III) Spin-Crossover Complex [Fe(III)(3-OMe-Sal 2 trien)] and Ferric Moiety Precursors
Autor: Shvachko, Yuri N ; Spitsyna, Nataliya G ; Starichenko, Denis V ; Zverev, Vladimir N ; Zorina, Leokadiya V ; Simonov, Sergey V ; Blagov, Maksim A ; Yagubskii, Eduard B
Assuntos: anion radical salts ; Anions ; Anions - chemistry ; Condensates ; Conductivity ; Coordination Complexes - chemistry ; Crystal structure ; Crystallization ; Crystals ; Electric Conductivity ; EPR ; Ferromagnetism ; Free Radicals - chemistry ; Hybrid structures ; Hybrid systems ; Hydrogen Bonding ; Imines ; Iodine ; Iron ; Iron - chemistry ; Ligands ; Magnetic properties ; Magnetics ; Magnetism ; Models, Molecular ; Molecular Structure ; Nickel - chemistry ; organic conductors ; Precursors ; Radicals ; Schiff Bases - chemistry ; Single crystals ; spin-crossover complexes ; SQUID ; Superconducting quantum interference devices ; Symmetry ; Thermal cycling ; Toluene - analogs & derivatives ; Toluene - chemistry
É parte de: Molecules (Basel, Switzerland), 2020-10, Vol.25 (21), p.4922
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SourceType-Scholarly Journals-1
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content type line 23
Descrição: In this study, crystals of the hybrid layered structure, combined with Fe(III) Spin-Crossover (SCO) complexes with metal-dithiolate anionic radicals, and the precursors with nitrate and iodine counterions, are obtained and characterized. [Fe(III)(3-OMe-Sal trien)][Ni(dmit) ] ( ), [Fe(III)(3-OMe-Sal trien)]NO ·H O ( ), [Fe(III)(3-OMe-Sal trien)]I ( ) (3-OMe-Sal trien = hexadentate N O Schiff base is the product of the condensation of triethylenetetramine with 3-methoxysalicylaldehyde; H dmit = 2-thioxo-1,3-dithiole-4,5-dithiol). Bulk SCO transition was not achieved in the range 2.0-350 K for all three compounds. Alternatively, the hybrid system ( ) exhibited irreversible segregation into the spatial fractions of Low-Spin (LS) and High-Spin (HS) phases of the ferric moiety, induced by thermal cycling. Fractioning was studied using both SQUID and EPR methods. Magnetic properties of the LS and HS phases were analyzed in the framework of cooperative interactions with anionic sublattice: Anion radical layers Ni(dmit) ( ), and H-bonded chains with NO and I ( , ). LS phase of ( ) exhibited unusual quasi-two-dimensional conductivity related to the Arrhenius mechanism in the anion radical layers, = 2 × 10 Ohm·cm and = 7 × 10 Ohm·cm at 293 K. Ground spin state of the insulating HS phase was distinctive by ferromagnetically coupled spin pairs of HS Fe , = 5/2, and metal-dithiolate radicals, = 1/2.
Editor: Switzerland: MDPI AG
Idioma: Inglês

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Magnetism, Conductivity and Spin-Spin Interactions in Layered Hybrid Structure of Anionic Radicals [Ni(dmit) 2 ] Alternated by Iron(III) Spin-Crossover Complex [Fe(III)(3-OMe-Sal 2 trien)] and Ferric Moiety Precursors

Shvachko, Yuri N ; Spitsyna, Nataliya G ; Starichenko, Denis V ; Zverev, Vladimir N ; Zorina, Leokadiya V ; Simonov, Sergey V ; Blagov, Maksim A ; Yagubskii, Eduard B

Switzerland: MDPI AG

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