Sol-gel Ormosils doped with TEMPO as Recyclable Catalysts for the Selective Oxidation of Alcohols

Organically modified silicas doped with TEMPO prepared via the sol-gel method are highly recyclable catalysts of the selective Montanari-Anelli oxidation of 1-nonanol; They show a notable "positive feedback" effect of matrix alkylation on the catalyst activity which is typical of doped sol-gel materials and markedly differentiates the behaviour of these materials from that of analogous silica-supported TEMPO.