High spin ↔ low spin ultrafast excitation and relaxation of an isolated iron(II) complex.G. Galle, J. Tribollet, G. Jonusauskas, M. Tondusson, C. Mauriac, J.F. Létard and E. FreyszEPJ Web of Conferences, 41 (2013) 05010DOI: https://doi.org/10.1051/epjconf/20134105010