STABILIZATION OF COBALT COMPLEXES BY FUNCTIONALIZED SILANES IN INORGANIC-ORGANIC HYBRID MATERIALS

The surrounding fields around cobalt ions in the pore-free inorganic-o rganic hybrid materials were controlled through coordination bonds by various functional groups directly bonded to the silica framework. Tet rachloro cobalt (II) ion [CoCl4](2-) was also stabilized for a period of over one month in the pore-free materials, whereas it was gradually transformed to [Co(H2O)(6)](2+) in the porous ones. The pore volume o f the hybrid materials was changed against the methyltrimethoxysilane to total silane ratio.