scholarly journals Cooperative High-Temperature Spin Crossover Accompanied by a Highly Anisotropic Structural Distortion

2016 ◽  
Vol 2016 (19) ◽  
pp. 3191-3195 ◽  
Author(s):  
Il'ya A. Gural'skiy ◽  
Bohdan O. Golub ◽  
Sergii I. Shylin ◽  
Vadim Ksenofontov ◽  
Helena J. Shepherd ◽  
...  
Keyword(s):  
High Temperature ◽  
Spin Crossover ◽  
Structural Distortion

scholarly journals Stabilization of the Low-Spin State in a Mononuclear Iron(II) Complex and High-Temperature Cooperative Spin Crossover Mediated by Hydrogen Bonding

2015 ◽  
Vol 22 (1) ◽  
pp. 331-339 ◽  
Author(s):  
Sipeng Zheng ◽  
Niels R. M. Reintjens ◽  
Maxime A. Siegler ◽  
Olivier Roubeau ◽  
Elisabeth Bouwman ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
High Temperature ◽  
Spin State ◽  
Spin Crossover ◽  
Mononuclear Iron

High-Temperature Spin Crossover in a Mononuclear Six-Coordinate Cobalt(II) Complex

2014 ◽  
Vol 53 (19) ◽  
pp. 10009-10011 ◽  
Author(s):  
Joanna Palion-Gazda ◽  
Anna Świtlicka-Olszewska ◽  
Barbara Machura ◽  
Thais Grancha ◽  
Emilio Pardo ◽  
...  
Keyword(s):  
High Temperature ◽  
Spin Crossover

High-temperature spin crossover in the [Fe(L)2][Fe(L)(NCS)3](NCS)·2H2O complex, L=tris(pyrazol-1-yl)methane

Polyhedron ◽  
2012 ◽  
Vol 31 (1) ◽  
pp. 64-68 ◽  
Author(s):  
O.G. Shakirova ◽  
L.G. Lavrenova ◽  
D.Yu. Naumov ◽  
V.A. Daletsky ◽  
L.A. Sheludyakova
Keyword(s):  
High Temperature ◽  
Spin Crossover

Spin-crossover in iron(ii) coordination compounds with 2,6-bis(benzimidazol-2-yl)pyridine

2020 ◽  
Vol 44 (15) ◽  
pp. 5834-5840 ◽  
Author(s):  
A. D. Ivanova ◽  
E. V. Korotaev ◽  
V. Yu. Komarov ◽  
L. A. Sheludyakova ◽  
V. A. Varnek ◽  
...  
Keyword(s):  
High Temperature ◽  
Coordination Compounds ◽  
Spin Crossover

Novel iron(ii) bromide, nitrate and dicyanamide complexes with 2,6-bis(benzimidazol-2-yl)pyridine possessing high-temperature 1A1 ↔ 5T2 spin crossover were obtained.

scholarly journals Dehydroxylation and Structural Distortion of Kaolinite as a High-Temperature Sorbent in the Furnace

Minerals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 587 ◽  
Author(s):  
Cheng ◽  
Xing ◽  
Bu ◽  
Zhang ◽  
Piao ◽  
...  
Keyword(s):  
High Temperature ◽  
Structural Distortion ◽  
Hydroxyl Groups ◽  
Drop Tube ◽  
X Ray Diffraction ◽  
Exponential Factor ◽  
Adsorption Characteristics ◽  
Flash Calcination ◽  
Infrared Spectrometer

As a high-temperature sorbent, kaolinite undergoes the flash calcination process in the furnace resulting in the dehydroxylation and structural distortion, which are closely related to its heavy metal/alkali metal adsorption characteristics. We investigated the flash calcination of kaolinite by the experiments using a drop tube furnace and by the characterization of flash-calcined products using thermogravimetric-differential scanning calorimeter (TG-DSC), X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR)and nuclear magnetic resonance (NMR). There were three kinds of hydroxyl groups in kaolinite during flash calcination at 800–1300 °C, E-type (~50%, easy), D-type (~40%, difficult) and U-type (~10%, unable) according to the removal difficulty. The hydroxyl groups activation was believed to be the first step of the removal of E-type and D-type hydroxyl groups. The kinetics model of dehydroxylation groups at 900–1200 °C was established following Arrhenius equation with the activation energy of 140 kJ/mol and the pre-exponential factor of 1.32 × 106 s−1. At 800 °C, the removal of E-type hydroxyl groups resulted in the conversion of a part of VI-coordinated Al in kaolinite to V-coordinated Al and the production of meta-kaolinite. When the temperature rose up to 1200 °C, mullite was produced and a part of V-coordinated Al converted to IV-coordinated Al and VI-coordinated Al. Finally, the adsorption characteristics of kaolinite was discussed according to the results of dehydroxylation and structural distortion.

Structural Distortion Controlled Spin-Crossover Behavior

2015 ◽  
Vol 15 (6) ◽  
pp. 2565-2567 ◽  
Author(s):  
Qian Yang ◽  
Xin Cheng ◽  
Chen Gao ◽  
BingWu Wang ◽  
ZheMing Wang ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Structural Distortion ◽  
Crossover Behavior

High-Temperature Spin Crossover in Complexes of Iron(II) closo-Borates with 2,6-Bis(benzimidazol-2-yl)pyridine

2020 ◽  
Vol 65 (11) ◽  
pp. 1687-1694
Author(s):  
A. D. Ivanova ◽  
L. G. Lavrenova ◽  
E. V. Korotaev ◽  
S. V. Trubina ◽  
L. A. Sheludyakova ◽  
...  
Keyword(s):  
High Temperature ◽  
Spin Crossover

High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material

2014 ◽  
Vol 43 (2) ◽  
pp. 729-737 ◽  
Author(s):  
Gavin A. Craig ◽  
Jose Sánchez Costa ◽  
Olivier Roubeau ◽  
Simon J. Teat ◽  
Helena J. Shepherd ◽  
...  
Keyword(s):  
High Temperature ◽  
Spin Crossover ◽  
Molecular Spin

High-Temperature Spin Crossover Behavior in a Nitrogen-Rich FeIII-Based System

2013 ◽  
Vol 52 (4) ◽  
pp. 1825-1831 ◽  
Author(s):  
Cyril Cook ◽  
Fatemah Habib ◽  
Tomoko Aharen ◽  
Rodolphe Clérac ◽  
Anguang Hu ◽  
...  
Keyword(s):  
High Temperature ◽  
Spin Crossover ◽  
Crossover Behavior
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