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Title: Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L222N5)(CN)2]

Abstract

The [Fe(L222N5)(CN)2] compound, where L222N5 refers to the macrocyclic Schiff-base ligand, 2,13-dimethyl-3,6,9,-12,18-pentaazabicyclo[12.3.1]octadeca-1(18),2,12,14,- 16-pentaene, is a photomagnetic FeII based coordination compound, which undergoes light-induced excited spin-state trapping (LIESST). The low spin state is hexacoordinated and the high spin state heptacoordinated. This system also serves as complex for the design of trinuclear or one-dimensional compounds made of other types of bricks with diverse coordinated metals. In this work, its ultrafast spin-state photoswitching dynamics are studied, by combining femtosecond optical spectroscopy and femtosecond X-ray absorption measurements at the XPP station of the X-ray free-electron laser LCLS. DFT and TD-DFT calculations are used to interpret experimental findings. These studies, performed in the solution phase, show that LIESST in [Fe(L222N5)(CN)2] occurs on the 100 fs timescale under different types of photoexcitation. In addition, coherent oscillations were observed, resulting from the structural dynamics accompanying LIESST, which were recently evidenced in more conventional octahedral FeIIN6 systems.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [2];  [3];  [3];  [3];  [4];  [4];  [5];  [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Univ. of Rennes, UR1-CNRS, UMR 6251 (France). Inst. of Physics of Rennes
  2. Univ. of Bordeaux, CNRS, ICMCB, Pessac (France); Lebanese German Univ. (LGU), Jounieh (Lebanon)
  3. Univ. of Bordeaux, CNRS, ICMCB, Pessac (France)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS); Paul Scherrer Inst. (PSI), Villigen (Switzerland). SwissFEL
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); French National Research Agency (ANR); French National Center for Scientific Research (CNRS); Brittany Region (France). Doctoral Research Allowances (ARED)
OSTI Identifier:
1457700
Alternate Identifier(s):
OSTI ID: 1410596
Grant/Contract Number:  
AC02-76SF00515; ANR-13-BS04-0002 FEMTOMAT; ANR-15-CE32-0004 BioXFEL; PEPS SASLELX; ARED 8925/XFELMAT
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry - A European Journal
Additional Journal Information:
Journal Volume: 24; Journal Issue: 20; Journal ID: ISSN 0947-6539
Publisher:
ChemPubSoc Europe
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; intersystem crossing; LIESST; spin crossover; time-resolved spectroscopy; X-ray absorption spectroscopy

Citation Formats

Zerdane, Serhane, Collet, Eric, Dong, Xu, Matar, Samir F., Wang, Hong Feng, Desplanches, Cedric, Chastanet, Guillaume, Chollet, Matthieu, Glownia, James M., Lemke, Henrick T., Lorenc, Maciej, and Cammarata, Marco. Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L222N5)(CN)2]. United States: N. p., 2017. Web. doi:10.1002/chem.201704746.
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Zerdane, Serhane, Collet, Eric, Dong, Xu, Matar, Samir F., Wang, Hong Feng, Desplanches, Cedric, Chastanet, Guillaume, Chollet, Matthieu, Glownia, James M., Lemke, Henrick T., Lorenc, Maciej, & Cammarata, Marco. Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L222N5)(CN)2]. United States. https://doi.org/10.1002/chem.201704746
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Zerdane, Serhane, Collet, Eric, Dong, Xu, Matar, Samir F., Wang, Hong Feng, Desplanches, Cedric, Chastanet, Guillaume, Chollet, Matthieu, Glownia, James M., Lemke, Henrick T., Lorenc, Maciej, and Cammarata, Marco. Fri . "Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L222N5)(CN)2]". United States. https://doi.org/10.1002/chem.201704746. https://www.osti.gov/servlets/purl/1457700.
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@article{osti_1457700,
title = {Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L222N5)(CN)2]},
author = {Zerdane, Serhane and Collet, Eric and Dong, Xu and Matar, Samir F. and Wang, Hong Feng and Desplanches, Cedric and Chastanet, Guillaume and Chollet, Matthieu and Glownia, James M. and Lemke, Henrick T. and Lorenc, Maciej and Cammarata, Marco},
abstractNote = {The [Fe(L222N5)(CN)2] compound, where L222N5 refers to the macrocyclic Schiff-base ligand, 2,13-dimethyl-3,6,9,-12,18-pentaazabicyclo[12.3.1]octadeca-1(18),2,12,14,- 16-pentaene, is a photomagnetic FeII based coordination compound, which undergoes light-induced excited spin-state trapping (LIESST). The low spin state is hexacoordinated and the high spin state heptacoordinated. This system also serves as complex for the design of trinuclear or one-dimensional compounds made of other types of bricks with diverse coordinated metals. In this work, its ultrafast spin-state photoswitching dynamics are studied, by combining femtosecond optical spectroscopy and femtosecond X-ray absorption measurements at the XPP station of the X-ray free-electron laser LCLS. DFT and TD-DFT calculations are used to interpret experimental findings. These studies, performed in the solution phase, show that LIESST in [Fe(L222N5)(CN)2] occurs on the 100 fs timescale under different types of photoexcitation. In addition, coherent oscillations were observed, resulting from the structural dynamics accompanying LIESST, which were recently evidenced in more conventional octahedral FeIIN6 systems.},
doi = {10.1002/chem.201704746},
journal = {Chemistry - A European Journal},
number = 20,
volume = 24,
place = {United States},
year = {2017},
month = {11}
}
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https://doi.org/10.1002/chem.201704746
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Figures / Tables:

Figure 2 Figure 2: Variation of the optical density (ΔOD) recorded with whitelight spectrometer 2 ps after photo-excitation at 490 nm. The OD increase in the IR (above ≈640 nm) and decrease in the visible parts of the spectrum is characteristic of the change from LS to HS states, as observed bymore » LIESST experiments at low temperature.« less
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    Works referencing / citing this record:

    Disentangling Ultrafast Electronic and Structural Dynamics with X-Ray Lasers
    journal, September 2018

    • Collet, Eric; Cammarata, Marco
    • Chemistry - A European Journal, Vol. 24, Issue 59
    • DOI: 10.1002/chem.201802105

    Photoselective MLCT to d-d pathways for light-induced excited spin state trapping
    journal, November 2019

    • Zerdane, S.; Cammarata, M.; Iasco, O.
    • The Journal of Chemical Physics, Vol. 151, Issue 17
    • DOI: 10.1063/1.5127507

    Pump–probe experimental methodology at the Linac Coherent Light Source
    journal, April 2019

    • Glownia, James M.; Gumerlock, Karl; Lemke, Henrik T.
    • Journal of Synchrotron Radiation, Vol. 26, Issue 3
    • DOI: 10.1107/s160057751900225x
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