Temperature- and Pressure-Induced Switching of the Molecular Spin State of an Orthorhombic Iron(III) Spin-Crossover Salt

2012 ◽  
Vol 2013 (5-6) ◽  
pp. 1001-1008 ◽  
Author(s):  
Antoine Tissot ◽  
Helena J. Shepherd ◽  
Loic Toupet ◽  
Eric Collet ◽  
Joelle Sainton ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Molecular Spin ◽  
Temperature And Pressure

Decoupling of the molecular spin-state and the crystallographic phase in the spin-crossover complex [Fe(ptz)6](BF4)2 studied by Raman spectroscopy

2005 ◽  
Vol 402 (4-6) ◽  
pp. 503-509 ◽  
Author(s):  
Nawel Ould Moussa ◽  
Gábor Molnár ◽  
Xavier Ducros ◽  
Antoine Zwick ◽  
Takeshi Tayagaki ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spin State ◽  
Spin Crossover ◽  
Molecular Spin

scholarly journals Addressing single spin crossover molecules in a two-dimensional monolayer

2021 ◽  
Author(s):  
Yongfeng Tong ◽  
Massine Kelaï ◽  
Kaushik Bairagi ◽  
Vincent Repain ◽  
Jérôme Lagoute ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Spin Crossover ◽  
Cooperative Behaviour ◽  
Spintronic Devices ◽  
Single Spin ◽  
Elastic Interactions ◽  
Molecular Spin ◽  
External Stimuli ◽  
At Will

Abstract Bistable spin-crossover molecules are particularly interesting to the development of innovative electronic and spintronic devices as they present two spin states that can be controlled by external stimuli. In this purpose, being able to switch at will the spin state of a single molecule in a dense molecular array is a key milestone. However, the elastic interactions between the molecules favour more cooperative behaviour where patches of neighbouring molecules switches simultaneously. We demonstrate here that the interaction of iron II spin-crossover molecules with a metallic substrate can strongly reduce their cooperative behaviour until addressing independently single molecular spin state. Mechanoelastic model is able to reproduce well such findings.

scholarly journals Linking Electronic Transport through a Spin Crossover Thin Film to the Molecular Spin State Using X-ray Absorption Spectroscopy Operando Techniques

2018 ◽  
Vol 10 (37) ◽  
pp. 31580-31585 ◽  
Author(s):  
Filip Schleicher ◽  
Michał Studniarek ◽  
Kuppusamy Senthil Kumar ◽  
Etienne Urbain ◽  
Kostantine Katcko ◽  
...  
Keyword(s):  
Thin Film ◽  
Absorption Spectroscopy ◽  
Spin State ◽  
Electronic Transport ◽  
Spin Crossover ◽  
X Ray ◽  
Molecular Spin ◽  
X Ray Absorption

scholarly journals Temperature and pressure effects on the spin state of ferric ions in the [Fe(sal2-trien)][Ni(dmit)2] spin crossover complex

2008 ◽  
Vol 69 (11) ◽  
pp. 2681-2686 ◽  
Author(s):  
Petra Á. Szilágyi ◽  
Stéphane Dorbes ◽  
Gábor Molnár ◽  
José Antonio Real ◽  
Zoltán Homonnay ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Pressure Effects ◽  
Ferric Ions ◽  
Temperature And Pressure ◽  
Temperature And Pressure Effects

Molecular Spin Crossover in Slow Motion: Light-Induced Spin-State Transitions in Trigonal Prismatic Iron(II) Complexes

2016 ◽  
Vol 55 (11) ◽  
pp. 5254-5265 ◽  
Author(s):  
Philipp Stock ◽  
Eva Deck ◽  
Silvia Hohnstein ◽  
Jana Korzekwa ◽  
Karsten Meyer ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Slow Motion ◽  
State Transitions ◽  
Molecular Spin ◽  
Trigonal Prismatic

scholarly journals Nonvolatile Voltage Controlled Molecular Spin-State Switching for Memory Applications

2021 ◽  
Vol 7 (3) ◽  
pp. 37
Author(s):  
Thilini K. Ekanayaka ◽  
Guanhua Hao ◽  
Aaron Mosey ◽  
Ashley S. Dale ◽  
Xuanyuan Jiang ◽  
...  
Keyword(s):  
Solid State ◽  
Spin State ◽  
Nonvolatile Memory ◽  
Spin Crossover ◽  
Low Cost ◽  
High Spin State ◽  
Device Fabrication ◽  
State Switching ◽  
Molecular Spin ◽  
Memory Applications

Nonvolatile, molecular multiferroic devices have now been demonstrated, but it is worth giving some consideration to the issue of whether such devices could be a competitive alternative for solid-state nonvolatile memory. For the Fe (II) spin crossover complex [Fe{H2B(pz)2}2(bipy)], where pz = tris(pyrazol-1-yl)-borohydride and bipy = 2,2′-bipyridine, voltage-controlled isothermal changes in the electronic structure and spin state have been demonstrated and are accompanied by changes in conductance. Higher conductance is seen with [Fe{H2B(pz)2}2(bipy)] in the high spin state, while lower conductance occurs for the low spin state. Plausibly, there is the potential here for low-cost molecular solid-state memory because the essential molecular thin films are easily fabricated. However, successful device fabrication does not mean a device that has a practical value. Here, we discuss the progress and challenges yet facing the fabrication of molecular multiferroic devices, which could be considered competitive to silicon.

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.

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.

AFM Imaging of Molecular Spin-State Changes through Quantitative Thermomechanical Measurements

2014 ◽  
Vol 26 (18) ◽  
pp. 2889-2893 ◽  
Author(s):  
Edna M. Hernández ◽  
Carlos M. Quintero ◽  
Olena Kraieva ◽  
Christophe Thibault ◽  
Christian Bergaud ◽  
...  
Keyword(s):  
Spin State ◽  
Afm Imaging ◽  
Molecular Spin ◽  
State Changes

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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