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Anomalous Light‐Induced Spin‐State Switching for Iron(II) Spin‐Crossover Molecules in Direct Contact with Metal Surfaces
- Source :
- Angewandte Chemie, Angewandte Chemie, 2020, 59 (32), pp.13341-13346. ⟨10.1002/anie.202003896⟩, Angewandte Chemie, Wiley-VCH Verlag, 2020, 59 (32), pp.13341-13346. ⟨10.1002/anie.202003896⟩, Angewandte Chemie International Edition
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Abstract
- Light‐induced spin‐state switching is one of the most attractive properties of spin‐crossover materials. In bulk, low‐spin (LS) to high‐spin (HS) conversion via the light‐induced excited spin‐state trapping (LIESST) effect may be achieved with a visible light, while the HS‐to‐LS one (reverse‐LIESST) requires an excitation in the near‐infrared range. Now, it is shown that those phenomena are strongly modified at the interface with a metal. Indeed, an anomalous spin conversion is presented from HS state to LS state under blue light illumination for FeII spin‐crossover molecules that are in direct contact with metallic (111) single‐crystal surfaces (copper, silver, and gold). To interpret this anomalous spin‐state switching, a new mechanism is proposed for the spin conversion based on the light absorption by the substrate that can generate low energy valence photoelectrons promoting molecular vibrational excitations and subsequent spin‐state switching at the molecule–metal interface.
- Subjects :
- Materials science
Spin states
02 engineering and technology
[CHIM.INOR]Chemical Sciences/Inorganic chemistry
010402 general chemistry
Molecular physics
01 natural sciences
Catalysis
LIESST
Spin crossover
[CHIM.COOR]Chemical Sciences/Coordination chemistry
ComputingMilieux_MISCELLANEOUS
Valence (chemistry)
010405 organic chemistry
General Chemistry
[CHIM.MATE]Chemical Sciences/Material chemistry
General Medicine
Photoelectric effect
021001 nanoscience & nanotechnology
0104 chemical sciences
X-ray Absorption Spectroscopy
Spin-Crossover
Molecule / metal interface
Excited state
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Condensed Matter::Strongly Correlated Electrons
Light induced transition
0210 nano-technology
Excitation
Visible spectrum
Subjects
Details
- Language :
- English
- ISSN :
- 15213773, 14337851, 00448249, and 15213757
- Volume :
- 59
- Issue :
- 32
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie International Edition
- Accession number :
- edsair.doi.dedup.....0852e44eddcd2b11c7f64383782d6e85
- Full Text :
- https://doi.org/10.1002/anie.202003896