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

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.

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

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 Spin-Crossover 2-D Hofmann Frameworks Incorporating an Amide-Functionalized Ligand: N-(pyridin-4-yl)benzamide

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 360-372
Author(s):  
Xandria Ong ◽  
Manan Ahmed ◽  
Luonan Xu ◽  
Ashley T. Brennan ◽  
Carol Hua ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Spin State ◽  
Spin Crossover ◽  
Variable Temperature ◽  
Spin Transition ◽  
Single Step ◽  
Amide Group ◽  
State Transitions ◽  
Structure Property ◽  
Scanning Calorimetry

Two analogous 2-D Hofmann-type frameworks, which incorporate the novel ligand N-(pyridin-4-yl)benzamide (benpy) [FeII(benpy)2M(CN)4]·2H2O (M = Pd (Pd(benpy)) and Pt (Pt(benpy))) are reported. The benpy ligand was explored to facilitate spin-crossover (SCO) cooperativity via amide group hydrogen bonding. Structural analyses of the 2-D Hofmann frameworks revealed benpy-guest hydrogen bonding and benpy-benpy aromatic contacts. Both analogues exhibited single-step hysteretic spin-crossover (SCO) transitions, with the metal-cyanide linker (M = Pd or Pt) impacting the SCO spin-state transition temperature and hysteresis loop width (Pd(benpy): T½↓↑: 201, 218 K, ∆T: 17 K and Pt(benpy): T½↓↑: 206, 226 K, ∆T: 20 K). The parallel structural and SCO changes over the high-spin to low-spin transition were investigated using variable-temperature, single-crystal, and powder X-ray diffraction, Raman spectroscopy, and differential scanning calorimetry. These studies indicated that the ligand–guest interactions facilitated by the amide group acted to support the cooperative spin-state transitions displayed by these two Hofmann-type frameworks, providing further insight into cooperativity and structure–property relationships.

Photoemission Study of Temperature-Induced and Photoinduced Spin-State Transitions in Spin-Crossover Complex [Fe(ptz)6](BF4)2

2007 ◽  
Vol 76 (8) ◽  
pp. 084703 ◽  
Author(s):  
Jin-Young Son ◽  
Kou Takubo ◽  
Daisuke Asakura ◽  
James W. Quilty ◽  
Takashi Mizokawa ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
State Transitions ◽  
Photoemission Study

Spin-State Transitions in an Iron Spin-Crossover Complex Observed with X-ray Emission and X-ray Absorption

2002 ◽  
Vol 75 (7-8) ◽  
pp. 919-925 ◽  
Author(s):  
H. Osawa ◽  
T. Iwazumi ◽  
H. Shoji ◽  
E. Hirai ◽  
T. Nakamura ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
State Transitions ◽  
X Ray ◽  
X Ray Absorption

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.

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