The amount of cobalt (III) ions introduced into the mesopores has
been controlled by the concentration of the cobalt complex in the
exchange solution and the existing percentage of silanolate on the
surface. The obtained FTIR results show that a part of surfactants
retain in the channel during the ion exchange in absolute and dry
ethanol. The colour change during this process indicates that cobalt
undergoes substitution reactions within its coordination sphere. UV-visible
characterization, consistent with previous study of EXAFS
spectroscopy confirms this evolution providing a full description of
the complex. Several steps were identified for direct ion exchanged
reaction that is include electrostatic adsorption of complex into the
channel, formation of ion pair with macro-counter ion MTS, and
grafting step with substitution reaction of macro-ligand MTS by
formation of Co-O-Si bridge
', './data/iijs/coversheet/cover_en.jpg'))