Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 22, Issue 5, Pages 2660-2666Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cp03483h
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Funding
- Computational Materials Sciences Program - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0014607]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
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Femtosecond-resolved Extended X-ray Absorption Fine Structure (EXAFS) measurements of solvated transition metal complexes are successfully implemented at the X-ray Free Electron Laser LCLS. Benchmark experiments on [Fe(terpy)(2)](2+) in solution show a signal-to-noise ratio on the order of 500, comparable to typical 100 ps-resolution synchrotron measurements. In the few femtoseconds after photoexcitation, we observe the EXAFS fingerprints of a short-lived (similar to 100 fs) intermediate as well as those of a vibrationally hot long-lived (similar to ns) excited state.
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