IUCr journals

Capturing molecular structural dynamics by 100 ps time-resolved X-ray absorption spectroscopy

J. Synchrotron Rad. (2009). 16, 110-115 [doi.org/10.1107/S0909049508034596]

[Graph] (a) Static and (b) photo-induced difference Fe K-edge TR-XAS of 50 mM [FeII(phen)3]2+ in water.
An experimental strategy and set-up for the 100-ps time-resolved X-ray absorption spectroscopy (TR-XAS) is presented. X-ray positional active feedback combined with a figure-of-merit scan of the laser beam position was employed as a key technique. It is shown that the pump-probe TR-XAS technique using the X-ray pulse structure at synchrotron sources is a powerful tool to investigate the dynamics of the electronic state and the molecular structure of non-crystalline samples. A TR-XAS measurement of a photo-induced spin crossover reaction of the tris(1,10-phenanthrorine)iron(II) complex in water is presented.

T. Sato, S. Nozawa, K. Ichiyanagi, A. Tomita, M. Chollet, H. Ichikawa, H. Fujii, S. Adachi and S. Koshihara