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.

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

A mononuclear five-coordinate Co(ii) single molecule magnet with a spin crossover between the S = 1/2 and 3/2 states

2018 ◽  
Vol 47 (46) ◽  
pp. 16596-16602 ◽  
Author(s):  
Lei Chen ◽  
Jingbo Song ◽  
Wen Zhao ◽  
Gangji Yi ◽  
Zhikuan Zhou ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Spin Crossover ◽  
Spin Transition ◽  
Single Molecule Magnet ◽  
Pyramidal Geometry ◽  
Mononuclear Cobalt ◽  
Slow Magnetic Relaxation ◽  
Square Pyramidal Geometry

A mononuclear cobalt(ii) complex with square pyramidal geometry displays a spin transition with a small hysteresis loop and slow magnetic relaxation.

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 Room-Temperature Switching of Spin-State in Single-Molecule Junctions

2020 ◽  
Author(s):  
Jing Li ◽  
QingQing Wu ◽  
Wei Xu ◽  
Hai-Chuan Wang ◽  
Hewei Zhang ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Room Temperature ◽  
High Spin State ◽  
Scanning Tunneling ◽  
Molecular Spintronics ◽  
State Switching ◽  
Square Planar ◽  
Single Molecule Junctions ◽  
Conductance Changes

Abstract The emerging of molecular spintronics offers a unique chance for the design of molecular devices with different spin-state, and the control of spin-state becomes essential for molecular spin switches. However, the intrinsic spin switching from low-spin to high-spin state is a temperature-dependent process with a small energy barrier that low temperature is required to maintain the low-spin state, and thus the room-temperature operation of single-molecule devices have not yet been achieved. Here, we investigated the single-molecule charge transport through a diamagnetic square planar nickel(II) porphyrin using the scanning tunneling microscope break-junction (STM-BJ) technique. The reversible single-molecule conductance switches are demonstrated by utilizing a coordination-induced spin-state switching to manipulate the spin state between S = 0 and S = 1 at room temperature. Furthermore, the different coordinated complexes could be distinguished from the conductance traces, which cannot be realized by the ensemble investigations such as NMR and UV-vis spectrums. The combined DFT calculations revealed that the conductance changes come from the different spin-states of the molecules varying the number of coordination ligands, suggesting coordination-induced spin-state switching provides a new way towards room-temperature molecular spintronics.

scholarly journals Electroswitching of the single-molecule magnet behaviour in an octahedral spin crossover cobalt(ii) complex with a redox-active pyridinediimine ligand

2020 ◽  
Vol 56 (81) ◽  
pp. 12242-12245
Author(s):  
Renato Rabelo ◽  
Luminita Toma ◽  
Nicolás Moliner ◽  
Miguel Julve ◽  
Francesc Lloret ◽  
...  
Keyword(s):  
Single Molecule ◽  
Spin Crossover ◽  
Single Molecule Magnet ◽  
Redox Active

A unique example of electroswitchable spin crossover molecular nanomagnet which proceeds through one-electron oxidation of the slow-relaxing paramagnetic low-spin CoII ion (SCo = 1/2, ON) to the diamagnetic low-spin CoIII ion (SCo = 0, OFF).

scholarly journals Uniaxial magnetic anisotropy of square-planar chromium(ii) complexes revealed by magnetic and HF-EPR studies

2015 ◽  
Vol 51 (100) ◽  
pp. 17688-17691 ◽  
Author(s):  
Yi-Fei Deng ◽  
Tian Han ◽  
Zhenxing Wang ◽  
Zhongwen Ouyang ◽  
Bing Yin ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Single Molecule Magnet ◽  
Uniaxial Magnetic Anisotropy ◽  
Square Planar

Two chromium(ii) complexes exhibit single-molecule-magnet behavior due to uniaxial magnetic anisotropy revealed by magnetic and HF-EPR studies.

Hysteresis in the ground and excited spin state up to 10 T of a [MnIII6MnIII]3+ triplesalen single-molecule magnet

2012 ◽  
Vol 3 (9) ◽  
pp. 2868 ◽  
Author(s):  
Veronika Hoeke ◽  
Klaus Gieb ◽  
Paul Müller ◽  
Liviu Ungur ◽  
Liviu F. Chibotaru ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Single Molecule Magnet

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 Switchable slow relaxation of magnetization in the native low temperature phase of a cooperative spin-crossover compound

2017 ◽  
Vol 8 (3) ◽  
pp. 2290-2295 ◽  
Author(s):  
A. Urtizberea ◽  
O. Roubeau
Keyword(s):  
Low Temperature ◽  
High Spin ◽  
Single Molecule ◽  
Spin Crossover ◽  
Slow Relaxation ◽  
Light Irradiation ◽  
Temperature Phase ◽  
Single Molecule Magnet ◽  
Trigonal Distortion ◽  
Low Temperature Phase

Field-induced slow relaxation of magnetization arising from local trigonal distortion at high-spin Fe(II) sites in [Fe(mtz)6](CF3SO3)2 is reversibly switched through light irradiation, the first example of native and switchable Single-Molecule-Magnet properties in a spin-crossover material.

scholarly journals A Mononuclear Fe(III) Single Molecule Magnet with a 3/2↔5/2 Spin Crossover

2012 ◽  
Vol 134 (33) ◽  
pp. 13651-13661 ◽  
Author(s):  
Susanne Mossin ◽  
Ba L. Tran ◽  
Debashis Adhikari ◽  
Maren Pink ◽  
Frank W. Heinemann ◽  
...  
Keyword(s):  
Single Molecule ◽  
Spin Crossover ◽  
Single Molecule Magnet
Sign in / Sign up

Export Citation Format

Share Document