Abstract
Structural changes of the iron(II)-tris-bipyridine () complex induced by ultrashort pulse excitation and population of its short-lived () quintet high spin state have been detected by picosecond x-ray absorption spectroscopy. The structural relaxation from the high spin to the low spin state was followed over the entire lifetime of the excited state. A combined analysis of the x-ray-absorption near-edge structure and extended x-ray-absorption fine structure spectroscopy features delivers an Fe-N bond elongation of 0.2 Å in the quintet state compared to the singlet ground state.
- Received 2 August 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.057401
©2007 American Physical Society