Study of the Photo-Switching of a Fe(II) Chiral Complex Through Linear and Nonlinear Ultrafast Spectroscopy.

@article{OuldHamouda2019StudyOT,
  title={Study of the Photo-Switching of a Fe(II) Chiral Complex Through Linear and Nonlinear Ultrafast Spectroscopy.},
  author={Amine Ould Hamouda and Fr{\'e}d{\'e}ric Dutin and J{\'e}r{\^o}me Degert and Marc Tondusson and Ahmad Naim and Patrick Rosa and Eric Freysz},
  journal={The journal of physical chemistry letters},
  year={2019}
}
Photo-switching the physical properties of molecular systems open large possibilities for driving materials far from equilibrium towards new states. Moreover, ultra-short pulses of light make it possible to induce and to record photo-switching on very short time-scale opening the way to fascinating new functionalities. Among molecular materials, Fe(II) complexes exhibit an ultrafast spin-state transition during which the spin state of the complex switches from a low spin state (LS, S=0) to a… Expand
3 Citations
Spin-state dependence of the structural and vibrational properties of solvated iron(ii) polypyridyl complexes from AIMD simulations: III. [Fe(tpen)]Cl2 in acetonitrile
In order to achieve an in-depth understanding of the role played by the solvent in the photoinduced low-spin (LS) → high-spin (HS) transition in solvated Fe(II) complexes, an accurate description ofExpand
New Applications of Spin-Crossover Complexes: Microwave Absorption, Chirooptical Switching and Enantioselective Detection
Spin transition complexes form a group of switchable materials that can change their magnetic, optical, electric, mechanical and other physical properties under the influence of different externalExpand
Spin-crossover materials: Getting the most from x-ray crystallography
  • S. Pillet
  • Materials Science
  • Journal of Applied Physics
  • 2021
The physical phenomenon of spin-crossover in molecular crystals is a multiscale process whose properties rely on the supramolecular organization of the spin-crossover active elements, theirExpand

References

SHOWING 1-10 OF 38 REFERENCES
Thermal and light-induced spin crossover in iron(II) complexes
Recently, we have discovered a fascinating photophysical effect in spin crossover complexes of iron(II) : Light-Induced Excited Spin State Trapping (LIESST). At sufficiently low temperatures, the lowExpand
Design and Study of Structural Linear and Nonlinear Optical Properties of Chiral [Fe(phen)3]2+ Complexes.
The dependence of nonlinear optical properties upon the spin state in molecular switches is still an unexplored area. Chiral [Fe( phen)3]2+ complexes are excellent candidates for those studiesExpand
Femtosecond spin-state photoswitching of molecular nanocrystals evidenced by optical spectroscopy.
TLDR
This result provides proof-of-principle for femtosecond switching at the nanoscale in SCO materials showing photomagnetic and photochromic responses, and takes advantage of growing knowledge in the field of ultrafast chemical physics. Expand
Sub-50-fs photoinduced spin crossover in [Fe(bpy)₃]²⁺.
TLDR
The results show that even though the SCO process in Fe(II) complexes represents a strongly spin-forbidden (ΔS = 2) two-electron transition, spin flipping occurs at near subvibrational times and is intertwined with the electron and structural dynamics of the system. Expand
Transient absorption spectroscopy of the [Fe(2 CH3-phen)3]2+ complex: study of the high spin ↔ low spin relaxation of an isolated iron(II) complex
We report on the light induced spin crossover dynamics of [Fe(2 CH3-phen)3]2+ complex in solution. The excitation of the complex by pulses centered at λ = 500 nm along the metal to ligand chargeExpand
Photo-induced spin-state conversion in solvated transition metal complexes probed via time-resolved soft X-ray spectroscopy.
TLDR
The results demonstrate the feasibility and unique potential of time-resolved soft X-ray absorption spectroscopy to study ultrafast reactions in the liquid phase by directly probing the valence orbitals of first-row metals as well as lighter elements during the course of photochemical transformations. Expand
Femtosecond XANES Study of the Light-Induced Spin Crossover Dynamics in an Iron(II) Complex
TLDR
These results resolve a long-standing issue about the population mechanism of quintet states in iron(II)-based complexes, which are identified as a simple 1MLCT→3 MLCT→5T cascade from the initially excited state. Expand
Femtosecond Soft X-ray Spectroscopy of Solvated Transition-Metal Complexes: Deciphering the Interplay of Electronic and Structural Dynamics.
TLDR
The first implementation of femtosecond soft X-ray spectroscopy as an ultrafast direct probe of the excited-state valence orbitals in solution-phase molecules is presented, highlighting the potential of this technique to study ultrafast phenomena in the solution phase. Expand
Nonlinear optical properties and application of a chiral and photostimulable iron(II) compound
We measure linear absorption, circular dichroism, second harmonic, and sum frequency generation in the [Δ-Fe(phen)3](Δ-As2(tartarate)2), [Λ-Fe(phen)3](Λ-As2(tartarate)2) enantiomers of an Fe(II)Expand
Femtosecond time-resolved optical and Raman spectroscopy of photoinduced spin crossover: temporal resolution of low-to-high spin optical switching.
TLDR
The results set an important precedent for extremely rapid, formally forbidden (DeltaS = 2) nonradiative relaxation as well as defining the time scale for intramolecular optical switching between two electronic states possessing vastly different spectroscopic, geometric, and magnetic properties. Expand
...
1
2
3
4
...