Iron(III) Spin-Crossover Compounds with a Wide Apparent Thermal Hysteresis around Room Temperature

2001 ◽  
Vol 123 (47) ◽  
pp. 11644-11650 ◽  
Author(s):  
Shinya Hayami ◽  
Zhong-ze Gu ◽  
Hajime Yoshiki ◽  
Akira Fujishima ◽  
Osamu Sato
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis

Bistable Spin-Crossover Nanoparticles Showing Magnetic Thermal Hysteresis near Room Temperature

2007 ◽  
Vol 19 (10) ◽  
pp. 1359-1361 ◽  
Author(s):  
E. Coronado ◽  
J. R. Galán-Mascarós ◽  
M. Monrabal-Capilla ◽  
J. García-Martínez ◽  
P. Pardo-Ibáñez
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis

scholarly journals Five 2,6-Di(pyrazol-1-yl)pyridine-4-carboxylate Esters, and the Spin States of their Iron(II) Complexes

2019 ◽  
Vol 5 (1) ◽  
pp. 9 ◽  
Author(s):  
Iurii Galadzhun ◽  
Rafal Kulmaczewski ◽  
and Malcolm A. Halcrow
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Spin Transition ◽  
Benzyl Ester ◽  
The Other ◽  
Spin States ◽  
Phenyl Ester ◽  
Coupling Reagent ◽  
Complex Salts

Two phenyl ester and three benzyl ester derivatives have been synthesized from 2,6-di(pyrazol-1-yl)pyridine-4-carboxylic acid and the appropriate phenyl or benzyl alcohol using N,N’-dicyclohexylcarbodiimide as the coupling reagent. Complexation of the ligands with Fe[BF4]2·6H2O in acetone yielded the corresponding [FeL2][BF4]2 complex salts. Four of the new ligands and four of the complexes have been crystallographically characterised. Particularly noteworthy are two polymorphs of [Fe(L3)2][BF4]2·2MeNO2 (L3 = 3,4-dimethoxyphenyl 2,6-di{pyrazol-1-yl}pyridine-4-carboxylate), one of which is crystallographically characterised as high-spin while the other exhibits the onset of spin-crossover above room temperature. The other complexes are similarly low-spin at low temperature but exhibit gradual spin-crossover on heating, except for an acetone solvate of [Fe(L5)2][BF4]2 (L5 = benzyl 2,6-di{pyrazol-1-yl}pyridine-4-carboxylate), which exhibits a more abrupt spin-transition at T½ = 273 K with 9 K thermal hysteresis.

Room temperature hysteretic spin crossover in a new cyanoheterometallic framework

2019 ◽  
Vol 55 (23) ◽  
pp. 3359-3362 ◽  
Author(s):  
Volodymyr M. Hiiuk ◽  
Sergiu Shova ◽  
Aurelian Rotaru ◽  
Vadim Ksenofontov ◽  
Igor O. Fritsky ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Ambient Conditions

A new iron(ii)-based spin-crossover compound with thermal hysteresis operating under ambient conditions is reported.

Room temperature bistability with wide thermal hysteresis in a spin crossover silica nanocomposite

2013 ◽  
Vol 1 (10) ◽  
pp. 1933 ◽  
Author(s):  
Pierrick Durand ◽  
Sébastien Pillet ◽  
El-Eulmi Bendeif ◽  
Cédric Carteret ◽  
Mohamed Bouazaoui ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Silica Nanocomposite

Tuning size and magnetic thermal hysteresis in a new near room temperature spin crossover compound

2013 ◽  
Vol 42 (23) ◽  
pp. 8205 ◽  
Author(s):  
Li Zhang ◽  
Juan-Juan Wang ◽  
Guan-Cheng Xu ◽  
Jing Li ◽  
Dian-Zeng Jia ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis

Room temperature study of the optical switching of a spin crossover compound inside its thermal hysteresis loop

2010 ◽  
Vol 96 (4) ◽  
pp. 041907 ◽  
Author(s):  
G. Gallé ◽  
D. Deldicque ◽  
J. Degert ◽  
Th. Forestier ◽  
J.-F. Létard ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Optical Switching ◽  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Temperature Study ◽  
Thermal Hysteresis Loop

scholarly journals Spin-crossover iron(ii) complex showing thermal hysteresis around room temperature with symmetry breaking and an unusually high T(LIESST) of 120 K

2019 ◽  
Vol 55 (81) ◽  
pp. 12227-12230 ◽  
Author(s):  
Víctor García-López ◽  
Mario Palacios-Corella ◽  
Salvador Cardona-Serra ◽  
Miguel Clemente-León ◽  
Eugenio Coronado
Keyword(s):  
Carboxylic Acid ◽  
Symmetry Breaking ◽  
Room Temperature ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Liesst Effect

The Fe(ii) complex of 4′,4′′ carboxylic acid disubstituted dipyrazolylpyridine shows spin-crossover around room temperature and the LIESST effect with T(LIESST) of 120 K.

Spin-crossover in an iron(iii) complex showing a broad thermal hysteresis

2021 ◽  
Author(s):  
Cyril Rajnák ◽  
Romana Mičová ◽  
Ján Moncoľ ◽  
Ľubor Dlháň ◽  
Christoph Krüger ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Mononuclear Complex ◽  
Hysteresis Width ◽  
Thermally Induced

A pentadentate Schiff-base ligand 3,5Cl-L2− and NCSe− form a iron(iii) mononuclear complex [Fe(3,5Cl-L)(NCSe)], which shows a thermally induced spin crossover with a broad hysteresis width of 24 K between 123 K (warming) and 99 K (cooling).

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,...

scholarly journals A family of heterobimetallic cubes shows spin‐crossover behaviour near room temperature

2021 ◽  
Author(s):  
Matthias Hardy ◽  
Jacopo Tessarolo ◽  
Julian J. Holstein ◽  
Niklas Struch ◽  
Norbert Wagner ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover
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