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  Spectral Signatures of Ultrafast Spin Crossover in Single Crystal [FeII(bpy)3](PF6)2

Field, R. L., Liu, L. C., Gawelda, W., Lu, C., & Miller, R. J. D. (2016). Spectral Signatures of Ultrafast Spin Crossover in Single Crystal [FeII(bpy)3](PF6)2. Chemistry – A European Journal, 22(15), 5118-5122. doi:10.1002/chem.201600374.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-0A74-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-6803-F
Genre: Journal Article

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http://dx.doi.org/10.1002/chem.201600374 (Publisher version)
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 Creators:
Field, R. L.1, 2, 3, 4, Author              
Liu, Lai Chung1, 2, 3, 4, Author              
Gawelda , Wojciech5, Author
Lu, Cheng 1, Author
Miller, R. J. Dwayne1, 2, 3, 4, Author              
Affiliations:
1Departments of Chemistry and Physics, University of Toronto, 80 St. George Street, Toronto M5S 1H6, Canada, ou_persistent22              
2Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
3The Hamburg Centre for Ultrafast Imaging, ou_persistent22              
4Centre for Free-Electron Laser Science, ou_persistent22              
5European XFEL, Hamburg, Germany, ou_persistent22              

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Free keywords: charge transfer; electron-phonon coupling; iron; spin crossover; time-resolved spectroscopy
 Abstract: Solvated iron(II)-tris(bipyridine) ([FeII(bpy)3]2+) has been extensively studied with regard to the spin crossover (SCO) phenomenon. Herein, the ultrafast spin transition dynamics of single crystal [FeII(bpy)3](PF6)2 was characterized for the first time using femtosecond transient absorption (TA) spectroscopy. The single crystal environment is of interest for experiments that probe the nuclear motions involved in the SCO transition, such as femtosecond X-ray and electron diffraction. We found that the TA at early times is very similar to what has been reported in solvated [FeII(bpy)3]2+, whereas the later dynamics are perturbed in the crystal environment. The lifetime of the high-spin state is found to be much shorter (100 ps) than in solution due to chemical pressure exerted by the lattice. Oscillatory behavior was observed on both time scales. Our results show that single crystal [FeII(bpy)3](PF6)2 serves as an excellent model system for localized molecular spin transitions.

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Language(s): eng - English
 Dates: 2016-01-272016-02-032016-02-252016-04-04
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/chem.201600374
 Degree: -

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Title: Chemistry – A European Journal
  Other : Chem. – Eur. J.
  Other : Chem. Eur. J.
Source Genre: Journal
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Publ. Info: Weinheim, Germany : VCH Verlagsgesellschaft
Pages: - Volume / Issue: 22 (15) Sequence Number: - Start / End Page: 5118 - 5122 Identifier: ISSN: 0947-6539
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058