scholarly journals Photo-switching spin pairs—synergy between LIESST effect and magnetic interaction in an iron(ii) binuclear spin-crossover compound

2001 ◽  
pp. 819-820 ◽  
Author(s):  
Guillaume Chastanet ◽  
Jean-François Létard ◽  
Ana B. Gaspar ◽  
José Antonio Real
Keyword(s):  
Spin Crossover ◽  
Magnetic Interaction ◽  
Liesst Effect ◽  
Spin Pairs

scholarly journals 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-Sal2trien)] and Ferric Moiety Precursors

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4922
Author(s):  
Yuri N. Shvachko ◽  
Nataliya G. Spitsyna ◽  
Denis V. Starichenko ◽  
Vladimir N. Zverev ◽  
Leokadiya V. Zorina ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Anion Radical ◽  
Spin Crossover ◽  
Hybrid Structure ◽  
Two Dimensional ◽  
Cooperative Interactions ◽  
Spin Interactions ◽  
Ground Spin State ◽  
Spin Pairs ◽  
System 1

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-Sal2trien)][Ni(dmit)2] (1), [Fe(III)(3-OMe-Sal2trien)]NO3·H2O (2), [Fe(III)(3-OMe-Sal2trien)]I (3) (3-OMe-Sal2trien = hexadentate N4O2 Schiff base is the product of the condensation of triethylenetetramine with 3-methoxysalicylaldehyde; H2dmit = 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 (1) 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)2 (1), and H-bonded chains with NO3 and I (2,3). LS phase of (1) exhibited unusual quasi-two-dimensional conductivity related to the Arrhenius mechanism in the anion radical layers, ρ||c = 2 × 105 Ohm·cm and ρ⊥c = 7 × 102 Ohm·cm at 293 K. Ground spin state of the insulating HS phase was distinctive by ferromagnetically coupled spin pairs of HS Fe3+, S = 5/2, and metal-dithiolate radicals, S = 1/2.

Evidencing size-dependent cooperative effects on spin crossover nanoparticles following their HS→LS relaxation

2018 ◽  
Vol 6 (46) ◽  
pp. 12698-12706 ◽  
Author(s):  
Teresa Delgado ◽  
Cristian Enachescu ◽  
Antoine Tissot ◽  
Andreas Hauser ◽  
Laure Guénée ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Size Dependence ◽  
Relaxation Mechanism ◽  
Cooperative Effects ◽  
Size Dependent ◽  
Liesst Effect

The size dependence of the relaxation mechanism after photo-excitation through the Light-Induced Excited Spin-State Trapping (LIESST) effect of [Fe(pz)Pt(CN)4] micro- and nanoparticles is evidenced experimentally and simulated in the framework of the mechanoelastic model.

Critical temperature of the LIESST effect in iron(II) spin crossover compounds

1999 ◽  
Vol 313 (1-2) ◽  
pp. 115-120 ◽  
Author(s):  
Jean-François Létard ◽  
Laurence Capes ◽  
Guillaume Chastanet ◽  
Nicolas Moliner ◽  
Sylvie Létard ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Spin Crossover ◽  
Liesst Effect

scholarly journals Spin crossover and LIESST effect of new iron(II) complexes with imidazole containing ligands

2009 ◽  
Vol 148 ◽  
pp. 012029 ◽  
Author(s):  
Naohide Matsumoto ◽  
Tetsuya Sato ◽  
Shingo Hashimoto ◽  
Masaaki Kojima ◽  
Seiichiro Iijima
Keyword(s):  
Spin Crossover ◽  
Liesst Effect

Spin-crossover and LIESST Effect for Iron(III) Complex Based on π–π Stacking by Coordination Programming

2014 ◽  
Vol 43 (7) ◽  
pp. 1058-1060 ◽  
Author(s):  
Manabu Nakaya ◽  
Kodai Shimayama ◽  
Kohei Takami ◽  
Kazuya Hirata ◽  
Amolegbe Saliu Alao ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Π Stacking ◽  
Liesst Effect
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