Issue 100, 2016, Issue in Progress

Periodic mesoporous organosilicas functionalized with iron(iii) complexes: preparation, characterization and catalysis on direct hydroxylation of benzene to phenol

Abstract

Three reusable, recoverable, iron(III) complexes incorporating periodic mesoporous organosilica PMO-Fe1–PMO-Fe3 were prepared. The composition, morphology, and textural properties with ordered mesoporous channel structure of the prepared materials were characterized by FT-IR, ICP, TGA, BET, SEM and TEM. Their catalytic performances were tested in the direct hydroxylation of benzene to phenol in liquid phase using H2O2 as oxidant. As expected, the incorporation of active-iron-centers within hydrophobic periodic mesoporous organosilica prevents over-oxidation of the designed phenol and hence significantly improves the selectivity of phenol with nearly two-folds compared with their corresponding homogeneous iron precursors Fe1–Fe3. In addition, these heterogeneous catalysts can be recovered and reused for at least four times without any significant loss of catalytic activity and selectivity.

Graphical abstract: Periodic mesoporous organosilicas functionalized with iron(iii) complexes: preparation, characterization and catalysis on direct hydroxylation of benzene to phenol

Article information

Article type
Paper
Submitted
15 Aug 2016
Accepted
08 Oct 2016
First published
10 Oct 2016

RSC Adv., 2016,6, 98406-98412

Periodic mesoporous organosilicas functionalized with iron(III) complexes: preparation, characterization and catalysis on direct hydroxylation of benzene to phenol

E. Gu, W. Zhong and X. Liu, RSC Adv., 2016, 6, 98406 DOI: 10.1039/C6RA20566F

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