scholarly journals Cooperative formation of high-spin species in a photoexcited spin-crossover complex

2006 ◽  
Vol 73 (1) ◽  
Author(s):  
Y. Moritomo ◽  
M. Kamiya ◽  
A. Nakamura ◽  
A. Nakamoto ◽  
N. Kojima
Keyword(s):  
High Spin ◽  
Spin Crossover ◽  
Spin Species

Trapping of metastable high-spin species and weak cooperativity in a mononuclear Fe(II) spin-crossover system

2003 ◽  
Vol 64 (6) ◽  
pp. 1003-1013 ◽  
Author(s):  
O Roubeau ◽  
M deVos ◽  
A.F Stassen ◽  
R Burriel ◽  
J.G Haasnoot ◽  
...  
Keyword(s):  
High Spin ◽  
Spin Crossover ◽  
Spin Species

An iron(II) complex tripodally chelated with 1,1,1-tris(pyridin-2-yl)ethane showing room-temperature spin-crossover behaviour

2016 ◽  
Vol 72 (11) ◽  
pp. 797-801 ◽  
Author(s):  
Takayuki Ishida ◽  
Takuya Kanetomo ◽  
Masaru Yamasaki
Keyword(s):  
High Spin ◽  
Room Temperature ◽  
Spin Crossover ◽  
Spin Transition ◽  
Complex Salt ◽  
Magnetic Study ◽  
The Novel ◽  
Bond Lengths ◽  
External Stimuli ◽  
Spin Species

The spin-crossover phenomenon is a reversible low- and high-spin transition caused by external stimuli such as heat. In the novel iron(II) complex salt tetraphenylphosphonium tris(thiocyanato-κN)[1,1,1-tris(pyridin-2-yl)ethane-κ3N,N′,N′′]ferrate(II), (C24H20P)[Fe(NCS)3(C17H15N3)], the Fe—N bond lengths are in the range 2.027 (2)–2.089 (2) Å, indicating that the specimen consists of comparable molar fractions of the low- and high-spin species at 296 K. A magnetic study confirmed that spin-crossover takes place at around 290 K.

scholarly journals Structural Insights into the Two-Step Spin-Crossover Compound Fe(3,4-dimethyl-pyridine)2[Ag(CN)2]2

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 316 ◽  
Author(s):  
José Alberto Rodríguez-Velamazán ◽  
Kosuke Kitase ◽  
Elías Palacios ◽  
Miguel Castro ◽  
Ángel Fernández-Blanco ◽  
...  
Keyword(s):  
High Spin ◽  
Spin Crossover ◽  
Spin Transition ◽  
Long Range Order ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Step Transition ◽  
Structural Insights ◽  
Spin Species

The crystal structure of the polymeric spin crossover compound Fe(3,4-dimethyl-pyridine)2[Ag(CN)2]2 has been solved and its temperature dependence followed by means of single-crystal and powder X-ray diffraction. This compound presents a two-step spin transition with relatively abrupt steps centred at ca. 170 K and 145 K and a plateau at around 155 K. The origin of the two-step transition is discussed in light of these structural studies. The observations are compatible with a mostly disordered state between the two steps, consisting of mixing of high-spin and low-spin species, while weak substructure reflections in the mixed phase could indicate some degree of long-range order of the high-spin and low-spin sites.

The Flexibility of Long Chain Substituents Influences Spin-Crossover in Isomorphous Lipid Bilayer Crystals

2021 ◽  
Author(s):  
Iurii Galadzhun ◽  
Rafal Kulmaczewski ◽  
Namrah Shahid ◽  
Oscar Cespedes ◽  
Mark J Howard ◽  
...  
Keyword(s):  
Lipid Bilayer ◽  
High Spin ◽  
Room Temperature ◽  
Spin Crossover ◽  
Pyridine Derivatives ◽  
Long Chain

[Fe(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine) derivatives bearing a bent geometry of hexadec-1-ynyl or hexadecyl substituents pyrazole are isomorphous, and high-spin at room temperature. However, only the latter compound undergoes an abrupt,...

Optical Microscopy Imaging of the Thermally-Induced Spin Transition and Isothermal Multi-stepped Relaxation in a Low-Spin Stabilized Spin-Crossover Material

2021 ◽  
Author(s):  
Pradip Chakraborty ◽  
Mouhamadou Sy ◽  
Houcem Fourati ◽  
Maria Teresa Delgado Pérez ◽  
Mousumi Dutta ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
High Spin ◽  
Spin Relaxation ◽  
Spin Crossover ◽  
Spin Transition ◽  
Host Lattice ◽  
Microscopy Imaging ◽  
Thermally Induced ◽  
Optical Microscopy Imaging

The thermal spin transition and the photo-induced high-spin → low-spin relaxation of the prototypical [Fe(ptz)6](BF4)2 spin-crossover compound (ptz = 1-propyltetrazole) diluted in the isostructural ruthenium host lattice [Ru(ptz)6](BF4)2, which stabilizes...

scholarly journals Spin Crossover between the High-Spin and Low-Spin States and Dielectric Switching in the Ionic Crystals of a Fe(II) [2 × 2] Molecular Grid

2020 ◽  
Vol 93 (12) ◽  
pp. 1583-1587
Author(s):  
Yuta Uezu ◽  
Ryo Tsunashima ◽  
Chiaki Tanaka ◽  
Masaru Fujibayashi ◽  
Jun Manabe ◽  
...  
Keyword(s):  
High Spin ◽  
Spin Crossover ◽  
Spin States ◽  
Ionic Crystals
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