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Title: Ultrafast intersystem crossings in Fe-Co Prussian blue analogues

Journal Article · · Scientific Reports
 [1]
  1. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Ultrafast spincrossover is studied in Fe-Co Prussian blue analogues using a dissipative quantum-mechanical model of a cobalt ion coupled to a breathing mode. All electronic interactions are treated on an equal footing. It is theoretically demonstrated that the divalent cobalt ion reaches 90% of the S = 3/2 value within 20 fs after photoexciting a low-spin Co3+ ion by an iron-to-cobalt charge transfer. The doublet-to-quartet spin crossover is significantly faster than the oscillation period of the breathing mode. The system relaxes to the lowest manifold of divalent cobalt (4T1) in 150-200 fs. In conclusion, strong oscillations in spin-orbit coupling and the involvement of higher-lying quartets are found.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division; Northern Illinois University, Institute for Nanoscience, Engineering and Technology
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1393194
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (3)

Photoinduced valence tautomerism of a cobalt-dioxolene complex revealed with femtosecond M-edge XANES journal September 2019
Dissipation and dynamics in ultrafast intersystem crossings journal January 2020
Deactivation of Excited States in Transition-Metal Complexes: Insight from Computational Chemistry journal November 2018

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