Figure 1: The [¹Ru^II=¹Co^III] complex.

(a) The molecular structure of the dyad studied in this work. The Ru and Co centres are held 13 Å apart by the tpphz rigid bridge. (b) Absorption and emission spectra of [¹Ru^II=] and [¹Ru^II=¹Co^III] in acetonitrile. The pump wavelength used for all the optical and X-ray experiments is indicated by the blue arrow.