scholarly journals [Fe(abpt)2(NCSe)2] polymorph A: structural studies into the spin crossover behaviour

2018 ◽  
Vol 42 (22) ◽  
pp. 18028-18037 ◽  
Author(s):  
Helen E. Mason ◽  
Michelle L. Hamilton ◽  
Judith A. K. Howard ◽  
Hazel A. Sparkes
Keyword(s):  
High Pressure ◽  
Spin Crossover ◽  
Spin Transition ◽  
Structural Studies

Crystallographic and UV-Vis analysis of the thermal spin-transition in [Fe(abpt)2(NCSe)2], polymorph A, is presented alongside LIESST and high pressure structures.

scholarly journals Structural studies of a flexible 2D layer spin crossover coordination polymer

2014 ◽  
Vol 70 (a1) ◽  
pp. C1238-C1238
Author(s):  
Yu-Chun Chuang ◽  
Chung-Kai Chang ◽  
Ching-Che Kao ◽  
Jey-Jau Lee ◽  
Chih-Chieh Wang
Keyword(s):  
Magnetic Property ◽  
Spin State ◽  
Spin Crossover ◽  
Layer Structure ◽  
Dominant Role ◽  
Spin Transition ◽  
High Spin State ◽  
Structural Studies ◽  
Synchrotron Powder Diffraction ◽  
Solvent Molecules

The first coordination sphere of spin crossover material has been comprehended to play a dominant role to its magnetic property. However, the intermolecular interactions, such as π···π interaction and hydrogen bonding, also play a crucial factor. The contents of the solvent in a 2D layer structure, Fe (μ-atrz)(μ-pyz)(NCS)2·nH2O where n=4, 2 and 0, has been reported to be able to affect the spin transition behavior dramatically.[1] As loss of solvent molecules, the inter-layer distance becomes shorter and the transition temperature shifts to lower temperature and accompanies a larger hysteresis loop. To further understand the correlation between the inter-layer distance and magnetic property, the guest ab/desorption and pressure-induced synchrotron powder diffraction experiments were performed at BL01C2 in NSRRC. Based on the cyclic TGA measurements, the guest molecules, H2O, MeOH and EtOH, all can be removed and retaken repeatedly. The pressure-induced PXRD experiment was performed using a Boehler-Almax design diamond anvil cell (DAC). The detail structural studies attempt to understand not only the spin state changes from HS (high spin state) to LS (low spin state) but also the cooperative effect through the inter-layer distance.

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.

scholarly journals Structural Studies into the Spin Crossover Behaviour of Fe(abpt)2(NCS)2 Polymorphs B and D

2021 ◽  
Author(s):  
Helen Elizabeth Mason ◽  
Jake R.C. Musselle-Sexton ◽  
Judith A. K. Howard ◽  
Michael Probert ◽  
Hazel Anne Sparkes
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Spin Crossover ◽  
Structural Features ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray

The spin-crossover behaviour of [Fe(abpt)2(NCS)2] (abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) polymorphs B and D have been studied using single crystal X-ray diffraction to monitor changes in structural features. High pressure single crystal...

Abrupt spin crossover in iron(iii) complexes with aromatic anions

2019 ◽  
Vol 48 (41) ◽  
pp. 15515-15520 ◽  
Author(s):  
Sharon E. Lazaro ◽  
Adil Alkaş ◽  
Seok J. Lee ◽  
Shane G. Telfer ◽  
Keith S. Murray ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Spin Crossover ◽  
Spin Transition ◽  
Halogen Bonds ◽  
Aromatic Anions

Two iron(iii) complexes, [Fe(qsal-X)2]OTs·nH2O, are found to exhibit abrupt spin crossover with the spin transition temperature substituent dependent, and X⋯O halogen bonds linking the spin centres.

scholarly journals Electrical read-out of light-induced spin transition in thin film spin crossover/graphene heterostructures

2021 ◽  
Author(s):  
Nikita Konstantinov ◽  
Arthur Tauzin ◽  
Ulrich Nguetchuissi Noumbé ◽  
Diana Dragoe ◽  
Bohdan Kundys ◽  
...  
Keyword(s):  
Thin Film ◽  
Spin Crossover ◽  
Spin Transition ◽  
Switching Device ◽  
Electronic Switching ◽  
Spin Transitions

An opto-electronic switching device made from an evaporated spin crossover thin film over a graphene sensor is presented. The electrical transduction of both temperature and light-induced reversible spin transitions are demonstrated.

Spin-crossover in a trans-[FeL2(NCS)2] family (L = triaryltriazole): remote substituent effects on spin transition modes and temperature

2013 ◽  
Vol 42 (28) ◽  
pp. 10144 ◽  
Author(s):  
Guo-Ping Shen ◽  
Li Qi ◽  
Lei Wang ◽  
Yan Xu ◽  
Jing-Jing Jiang ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Spin Transition ◽  
Substituent Effects ◽  
Transition Modes ◽  
Remote Substituent
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