Back to Search
Start Over
Electronic and Structural Dynamics During the Switching of the Photomagnetic Complex [Fe(L 222 N 5 )(CN) 2 ].
- Source :
-
Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2018 Apr 06; Vol. 24 (20), pp. 5064-5069. Date of Electronic Publication: 2017 Nov 28. - Publication Year :
- 2018
-
Abstract
- The [Fe(L <subscript>222</subscript> N <subscript>5</subscript> )(CN) <subscript>2</subscript> ] compound, where L <subscript>222</subscript> N <subscript>5</subscript> 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 Fe <superscript>II</superscript> 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. Here 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(L <subscript>222</subscript> N <subscript>5</subscript> )(CN) <subscript>2</subscript> ] 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 Fe <superscript>II</superscript> N <subscript>6</subscript> systems.<br /> (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3765
- Volume :
- 24
- Issue :
- 20
- Database :
- MEDLINE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 29105179
- Full Text :
- https://doi.org/10.1002/chem.201704746