Spin-State Energetics and Spin-Crossover Behavior of Pseudotetrahedral Cobalt(III)−Imido Complexes. The Role of the Tripodal Supporting Ligand

2007 ◽  
Vol 46 (19) ◽  
pp. 7890-7898 ◽  
Author(s):  
Ingar H. Wasbotten ◽  
Abhik Ghosh
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Imido Complexes ◽  
Crossover Behavior

Influence of ligand substituent conformation on the spin state of an iron(ii)/di(pyrazol-1-yl)pyridine complex

2021 ◽  
Vol 50 (10) ◽  
pp. 3464-3467
Author(s):  
Rafal Kulmaczewski ◽  
Mark J. Howard ◽  
Malcolm A. Halcrow
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Solution Phase ◽  
Pyridine Complex

The temperature of the solution-phase spin-crossover equilibrium in iron(ii) complexes of 4-alkylsulfanyl-2,6-di{pyrazol-1-yl}pyridine (bppSR) complexes depends strongly on the alkylsulfanyl substituent.

Study of the catalytic mechanism of a non-heme Fe catalyst: The role of the spin state of the iron

2021 ◽  
Vol 764 ◽  
pp. 138282
Author(s):  
Aikaterini Gemenetzi ◽  
Panagiota Stathi ◽  
Yiannis Deligiannakis ◽  
Maria Louloudi
Keyword(s):  
Spin State ◽  
Catalytic Mechanism ◽  
Fe Catalyst

scholarly journals Spin-state-dependent electrical conductivity in single-walled carbon nanotubes encapsulating spin-crossover molecules

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Julia Villalva ◽  
Aysegul Develioglu ◽  
Nicolas Montenegro-Pohlhammer ◽  
Rocío Sánchez-de-Armas ◽  
Arturo Gamonal ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Spin State ◽  
Spin Crossover ◽  
Single Walled Carbon Nanotubes ◽  
Guest Molecules ◽  
Spintronic Devices ◽  
Single Walled Carbon ◽  
State Dependent ◽  
Lack Of Control ◽  
Walled Carbon Nanotubes

AbstractSpin crossover (SCO) molecules are promising nanoscale magnetic switches due to their ability to modify their spin state under several stimuli. However, SCO systems face several bottlenecks when downscaling into nanoscale spintronic devices: their instability at the nanoscale, their insulating character and the lack of control when positioning nanocrystals in nanodevices. Here we show the encapsulation of robust Fe-based SCO molecules within the 1D cavities of single-walled carbon nanotubes (SWCNT). We find that the SCO mechanism endures encapsulation and positioning of individual heterostructures in nanoscale transistors. The SCO switch in the guest molecules triggers a large conductance bistability through the host SWCNT. Moreover, the SCO transition shifts to higher temperatures and displays hysteresis cycles, and thus memory effect, not present in crystalline samples. Our results demonstrate how encapsulation in SWCNTs provides the backbone for the readout and positioning of SCO molecules into nanodevices, and can also help to tune their magnetic properties at the nanoscale.

Effect of metal dilution on the spin-crossover behavior in [FexM1-x(phen)2(NCS)2] (M = Mn, Co, Ni, Zn)

1982 ◽  
Vol 21 (9) ◽  
pp. 3429-3433 ◽  
Author(s):  
P. Ganguli ◽  
P. Guetlich ◽  
E. W. Mueller
Keyword(s):  
Spin Crossover ◽  
Crossover Behavior

Modification of Spin Crossover Behavior through Solvent Assisted Formation and Solvent Inclusion in a Triply Interpenetrating Three-Dimensional Network

2007 ◽  
Vol 46 (10) ◽  
pp. 4220-4229 ◽  
Author(s):  
Matthias Bartel ◽  
Alina Absmeier ◽  
Guy N. L. Jameson ◽  
Franz Werner ◽  
Kenichi Kato ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Three Dimensional ◽  
Dimensional Network ◽  
Crossover Behavior

Spin-Crossover Behavior in Cyanide-Bridged Iron(II)−Copper(I) Bimetallic 1−3D Metal−Organic Frameworks

2009 ◽  
Vol 48 (8) ◽  
pp. 3371-3381 ◽  
Author(s):  
Gloria Agustí ◽  
M. Carmen Muñoz ◽  
Ana B. Gaspar ◽  
José A. Real
Keyword(s):  
Spin Crossover ◽  
Metal Organic Frameworks ◽  
Crossover Behavior ◽  
Metal Organic

scholarly journals Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4155
Author(s):  
Alexander V. Shokurov ◽  
Daria S. Kutsybala ◽  
Andrey P. Kroitor ◽  
Alexander A. Dmitrienko ◽  
Alexander G. Martynov ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Water Interface ◽  
Metal Centers ◽  
Axial Coordination ◽  
Vis Spectroscopy ◽  
Air Water Interface ◽  
Nickel Cation

Coordination-induced spin crossover (CISCO) in nickel(II) porphyrinates is an intriguing phenomenon that is interesting from both fundamental and practical standpoints. However, in most cases, realization of this effect requires extensive synthetic protocols or extreme concentrations of extra-ligands. Herein we show that CISCO effect can be prompted for the commonly available nickel(II) tetraphenylporphyrinate, NiTPP, upon deposition of this complex at the air/water interface together with a ruthenium(II) phthalocyaninate, CRPcRu(pyz)2, bearing two axial pyrazine ligands. The latter was used as a molecular guiderail to align Ni···Ru···Ni metal centers for pyrazine coordination upon lateral compression of the system, which helps bring the two macrocycles closer together and forces the formation of Ni–pyz bonds. The fact of Ni(II) porphyrinate switching from low- to high-spin state upon acquiring additional ligands can be conveniently observed in situ via reflection-absorption UV-vis spectroscopy. The reversible nature of this interaction allows for dissociation of Ni–pyz bonds, and thus, change of nickel cation spin state, upon expansion of the monolayer.

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