The synthesis of MCM-41 analogue mesoporous metallosilicates with high
specific surfaces, containing the redox active metals Ti, V, Cr, Mn,
Fe, or Co, from an aqueous gel, under reflux is described. Their X-ray
diffractograms reveal a highly ordered array of the mesopores. A stro
ng host-guest interaction between the incorporated template molecules
and the pore walls, observed by C-13 n.m.r., indicates the incorporati
on of the metals, which is further evidenced by u.v.-vis and Si-29 n.m
.r. spectroscopy. These mesoporous metallosilicates are active as cata
lysts for the liquid phase oxidation of cyclohexane with aqueous H2O2
or tert-butyl hydroperoxide. (C) Elsevier Science Inc. 1997.