scholarly journals Spin-state dependent conductance switching in single molecule-graphene junctions

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 7905-7911 ◽  
Author(s):  
Enrique Burzurí ◽  
Amador García-Fuente ◽  
Victor García-Suárez ◽  
Kuppusamy Senthil Kumar ◽  
Mario Ruben ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Spin Crossover ◽  
Electrical Current ◽  
Conductance Switching ◽  
State Dependent

Spin-crossover (SCO) switching of individual molecules connected to graphene electrodes is detected in the electrical current.

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.

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.

Spin-crossover in an organic–inorganic hybrid perovskite

2020 ◽  
Vol 56 (33) ◽  
pp. 4551-4554 ◽  
Author(s):  
Wei-Wei Wu ◽  
Si-Guo Wu ◽  
Yan-Cong Chen ◽  
Guo-Zhang Huang ◽  
Bang-Heng Lyu ◽  
...  
Keyword(s):  
Spin State ◽  
Perovskite Structure ◽  
Spin Crossover ◽  
Fluorescence Properties ◽  
Inorganic Hybrid ◽  
State Dependent ◽  
Hybrid Perovskite

The first spin-crossover complex with an organic–inorganic hybrid perovskite structure is reported, which displays three-step spin-crossover, light-induced excited spin-state trapping and spin-state dependent fluorescence properties.

Single molecule magnet behaviour in a square planar S = 1/2 Co(ii) complex and spin-state assignment of multiple relaxation modes

2020 ◽  
Vol 56 (49) ◽  
pp. 6711-6714
Author(s):  
Indrani Bhowmick ◽  
David W. Shaffer ◽  
Jenny Y. Yang ◽  
Matthew P. Shores
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Spin Crossover ◽  
Single Molecule Magnet ◽  
State Assignment ◽  
Square Planar ◽  
Relaxation Modes

First reports of a square planar S = 1/2 Co(ii) single molecule magnet, and spin state assignment to the multiple relaxation modes of a structurally related spin crossover Co(ii) complex.

Slow spin crossover in bis-meridional Fe2+ complexes through spin-state auto-adaptive N6/N8 coordination

2018 ◽  
Vol 47 (48) ◽  
pp. 17257-17265 ◽  
Author(s):  
Holm Petzold ◽  
Gerald Hörner ◽  
Linda Schnaubelt ◽  
Tobias Rüffer
Keyword(s):  
Coordination Number ◽  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
State Dependent ◽  
Thermodynamic Stabilization

The X-factor: Exchange of pyridine (X = N) for phenyl (X = CH) substituents renders the coordination number of Fe2+ complexes spin-state dependent. Slow spin-state exchange emerges through kinetic and thermodynamic stabilization of the N6(+2) high-spin state.

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 Crossover and Field‐Induced Single‐Molecule Magnet Behaviour in Co(II) Complexes Based on Terpyridine with Tetrathiafulvalene Analogues

2021 ◽  
Author(s):  
Siham Tiaouinine ◽  
Jessica Flores Gonzalez ◽  
Bertrand Lefeuvre ◽  
Thierry Guizouarn ◽  
Marie Cordier ◽  
...  
Keyword(s):  
Single Molecule ◽  
Spin Crossover ◽  
Single Molecule Magnet

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.

scholarly journals Programmable spin-state switching in a mixed-valence spin-crossover iron grid

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Takuto Matsumoto ◽  
Graham N. Newton ◽  
Takuya Shiga ◽  
Shinya Hayami ◽  
Yuta Matsui ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
Mixed Valence ◽  
State Switching

ChemInform Abstract: SPIN STATE DEPENDENT REDOX PROPERTIES OF THE (FE(III)(X-SAL)2TRIEN)+ SPIN-EQUILIBRIUM SYSTEM IN SOLUTION

1980 ◽  
Vol 11 (49) ◽  
Author(s):  
K. M. KADISH ◽  
K. DAS ◽  
D. SCHAEPER ◽  
C. L. MERRILL ◽  
B. R. WELCH ◽  
...  
Keyword(s):  
Spin State ◽  
Redox Properties ◽  
Equilibrium System ◽  
State Dependent
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