The Ru K-edge shows that the spectrum of Ru-CTF (black trace) is identical to that of the parent monomer [Ru(tda)(py)2] (purple trace) and clearly different from the Ru precursor complex [Ru(tda)(dmso)(py)] (yellow trace). The experimental and simulated EXAFS region spectrum is in agreement with a typical octahedral coordination for Ru(II) in Ru-CTF, where fitted Ru-N/O distances at 1.92 and 2.08 Å are in good agreement with the X-ray structure of the monomer [Ru(tda)(py)2] (see Figure and Table ). Finally, ICP-OES analysis revealed a 1.05 ± 0.08% (in weight) of Ru content that is consistent with a substitution of about 14% of the dangling pyridines in the initial CTF material (Table ), indicating a quite low uptake of catalyst probably influenced by the small SABET and the aggregated CTF particles.