Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces

Luqiong Zhang; Yongfeng Tong; Massine Kelai; Amandine Bellec; Jérôme Lagoute; Cyril Chacon; Yann Girard; Sylvie Rousset; Marie Laure Boillot; Eric Rivière; Talal Mallah; Edwige Otero; Marie Anne Arrio; Philippe Sainctavit; Vincent Repain

doi:10.1002/anie.202003896

Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces

Luqiong Zhang, Yongfeng Tong, Massine Kelai, Amandine Bellec^*, Jérôme Lagoute, Cyril Chacon, Yann Girard, Sylvie Rousset, Marie Laure Boillot, Eric Rivière, Talal Mallah, Edwige Otero, Marie Anne Arrio, Philippe Sainctavit, Vincent Repain^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

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 Fe^II 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.

Original language	English
Pages (from-to)	13341-13346
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	59
Issue number	32
DOIs	https://doi.org/10.1002/anie.202003896
Publication status	Published - 3 Aug 2020
Externally published	Yes

Keywords

X-ray absorption
ferrous ion complexes
light conversion
monolayer
spin-crossover

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10.1002/anie.202003896

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Zhang, L., Tong, Y., Kelai, M., Bellec, A., Lagoute, J., Chacon, C., Girard, Y., Rousset, S., Boillot, M. L., Rivière, E., Mallah, T., Otero, E., Arrio, M. A., Sainctavit, P., & Repain, V. (2020). Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces. Angewandte Chemie - International Edition, 59(32), 13341-13346. https://doi.org/10.1002/anie.202003896

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title = "Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces",

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.",

keywords = "X-ray absorption, ferrous ion complexes, light conversion, monolayer, spin-crossover",

author = "Luqiong Zhang and Yongfeng Tong and Massine Kelai and Amandine Bellec and J{\'e}r{\^o}me Lagoute and Cyril Chacon and Yann Girard and Sylvie Rousset and Boillot, \{Marie Laure\} and Eric Rivi{\`e}re and Talal Mallah and Edwige Otero and Arrio, \{Marie Anne\} and Philippe Sainctavit and Vincent Repain",

note = "Publisher Copyright: {\textcopyright} 2020 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2020",

month = aug,

day = "3",

doi = "10.1002/anie.202003896",

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Zhang, L, Tong, Y, Kelai, M, Bellec, A, Lagoute, J, Chacon, C, Girard, Y, Rousset, S, Boillot, ML, Rivière, E, Mallah, T, Otero, E, Arrio, MA, Sainctavit, P & Repain, V 2020, 'Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces', Angewandte Chemie - International Edition, vol. 59, no. 32, pp. 13341-13346. https://doi.org/10.1002/anie.202003896

TY - JOUR

T1 - Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces

AU - Zhang, Luqiong

AU - Tong, Yongfeng

AU - Kelai, Massine

AU - Bellec, Amandine

AU - Lagoute, Jérôme

AU - Chacon, Cyril

AU - Girard, Yann

AU - Rousset, Sylvie

AU - Boillot, Marie Laure

AU - Rivière, Eric

AU - Mallah, Talal

AU - Otero, Edwige

AU - Arrio, Marie Anne

AU - Sainctavit, Philippe

AU - Repain, Vincent

PY - 2020/8/3

Y1 - 2020/8/3

N2 - 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.

AB - 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.

KW - X-ray absorption

KW - ferrous ion complexes

KW - light conversion

KW - monolayer

KW - spin-crossover

UR - https://www.scopus.com/pages/publications/85085897319

U2 - 10.1002/anie.202003896

DO - 10.1002/anie.202003896

M3 - Article

C2 - 32348022

AN - SCOPUS:85085897319

SN - 1433-7851

VL - 59

SP - 13341

EP - 13346

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 32

ER -

Anomalous Light-Induced Spin-State Switching for Iron(II) Spin-Crossover Molecules in Direct Contact with Metal Surfaces

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Keywords

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