Structural determination of a short-lived excited iron(II) complex by picosecond x-ray absorption spectroscopy.
Structural changes of the iron(II)-tris-bipyridine ([Fe(II)(bpy)(3)](2+)) complex induced by ultrashort pulse excitation and population of its short-lived (< or =0.6 ns) 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 A in the quintet state compared to the singlet ground state.
Gawelda
Wojciech
W
Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC, FSB-BSP, CH-1015 Lausanne, Switzerland.
Pham
Van-Thai
VT
Benfatto
Maurizio
M
Zaushitsyn
Yuri
Y
Kaiser
Maik
M
Grolimund
Daniel
D
Johnson
Steven L
SL
Abela
Rafael
R
Hauser
Andreas
A
Bressler
Christian
C
Chergui
Majed
M