Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence

Lucas Gournay; Ievgeniia Chaban; Jean Yves Mevellec; Bernard Humbert; Etienne Janod; Laurent Guerin; Marco Cammarata; Nathalie Daro; Guillaume Chastanet; Eric Collet

doi:10.1016/j.cplett.2022.139395

Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence

Lucas Gournay
, Ievgeniia Chaban
, Jean Yves Mevellec
, Bernard Humbert
, Etienne Janod
, Laurent Guerin
, Marco Cammarata
, Nathalie Daro
, Guillaume Chastanet
, Eric Collet

IPR (Institut de Physique de Rennes) - UMR 6251
Université de Nantes
Univ. Bordeaux

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

Abstract

The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)₂(NCS)₂] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.

Original language	English
Article number	139395
Journal	Chemical Physics Letters
Volume	791
DOIs	https://doi.org/10.1016/j.cplett.2022.139395
Publication status	Published - 16 Mar 2022
Externally published	Yes

Keywords

LIESST
Out-of-equilibrium
Photoinduced phenomena
Raman
Spin Crossover

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10.1016/j.cplett.2022.139395

Cite this

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title = "Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence",

abstract = "The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)2(NCS)2] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.",

keywords = "LIESST, Out-of-equilibrium, Photoinduced phenomena, Raman, Spin Crossover",

author = "Lucas Gournay and Ievgeniia Chaban and Mevellec, \{Jean Yves\} and Bernard Humbert and Etienne Janod and Laurent Guerin and Marco Cammarata and Nathalie Daro and Guillaume Chastanet and Eric Collet",

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year = "2022",

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doi = "10.1016/j.cplett.2022.139395",

language = "English",

volume = "791",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence

AU - Gournay, Lucas

AU - Chaban, Ievgeniia

AU - Mevellec, Jean Yves

AU - Humbert, Bernard

AU - Janod, Etienne

AU - Guerin, Laurent

AU - Cammarata, Marco

AU - Daro, Nathalie

AU - Chastanet, Guillaume

AU - Collet, Eric

PY - 2022/3/16

Y1 - 2022/3/16

N2 - The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)2(NCS)2] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.

AB - The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)2(NCS)2] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.

KW - LIESST

KW - Out-of-equilibrium

KW - Photoinduced phenomena

KW - Raman

KW - Spin Crossover

UR - https://www.scopus.com/pages/publications/85123638975

U2 - 10.1016/j.cplett.2022.139395

DO - 10.1016/j.cplett.2022.139395

M3 - Article

AN - SCOPUS:85123638975

SN - 0009-2614

VL - 791

JO - Chemical Physics Letters

JF - Chemical Physics Letters

M1 - 139395

ER -

Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence

Abstract

Keywords

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