Exploring porous nanosilica-TEMPO as heterogeneous aerobic oxidation catalyst: the influence of supported gold clusters
Journal of Porous Materials, 2016•Springer
TEMPO stable free radical has been supported on porous silica nanoparticles in different
ways and the resulted materials have been tested as heterogeneous oxidation catalyst of
three benzylic alcohols using air as final oxidant and nitrosonium tetrafluoroborate as
cocatalyst. Good to excellent yields were obtained. The catalytic system consists in fact in
two coupled cycles, NO/NO 2 and TEMPO+/TEMPO, able to convert under mild conditions
(room temperature, air, metal and halogen free condition) alcohols into aldehydes or …
ways and the resulted materials have been tested as heterogeneous oxidation catalyst of
three benzylic alcohols using air as final oxidant and nitrosonium tetrafluoroborate as
cocatalyst. Good to excellent yields were obtained. The catalytic system consists in fact in
two coupled cycles, NO/NO 2 and TEMPO+/TEMPO, able to convert under mild conditions
(room temperature, air, metal and halogen free condition) alcohols into aldehydes or …
Abstract
TEMPO stable free radical has been supported on porous silica nanoparticles in different ways and the resulted materials have been tested as heterogeneous oxidation catalyst of three benzylic alcohols using air as final oxidant and nitrosonium tetrafluoroborate as cocatalyst. Good to excellent yields were obtained. The catalytic system consists in fact in two coupled cycles, NO/NO2 and TEMPO+/TEMPO, able to convert under mild conditions (room temperature, air, metal and halogen free condition) alcohols into aldehydes or ketones. Under these conditions, supported TEMPO on silica nanoparticles containing gold clusters lowers the efficiency of the catalyst.
Springer
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