I will present molecular dynamics obtained by diffraction of relativistic electrons exemplified on the rotational and vibrational modes of small model systems [1,2]. I will point out electron-specific advantages in diffraction of small molecules and discuss future applications on larger molecular systems. In addition, I will present site specific electronic probing of molecular dynamics accomplished by soft x-ray pulses at the oxygen K-edge. We used this scheme to unequivocally observe a molecular intersystem crossing from a ππ* state to a nπ* state [3]. Combinations of the two techniques for a more complete dynamical description will be discussed.
[1] J. Yang, et al.,Nature Comm. 7, 11232 (2016)
[2] J. Yang, et al., Phys. Rev. Lett. 115, 173002 (2016)
[3] T. J. A. Wolf et al., Nature Communications 8, 29 (2017)