New method for the immobilization of nitroxyl radical on mesoporous silica

A Machado, M. H. Casimiro, L. M. Ferreira, J. E. Castanheiro, A. M. Ramos, I. M. Fonseca, J. Vital

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This work reports the covalent attachment of 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-hydroxy-TEMPO) on the mesoporous silicas MCM-41 and SBA-15, by using 1,4-diisocyanatobutane as a binder. The catalysts were characterized by nitrogen adsorption/desorption, XRD, TEM, TGA, DSC and FTIR spectroscopy. Catalytic tests were performed on the liquid phase oxidation of benzyl alcohol and the secondary alcohol isoborneol by using tert-butyl hydroperoxide as oxidant. The catalysts showed good activity and stability in consecutive oxidation experiments with the same catalyst samples. (C) 2014 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)63-72
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume203
Issue numberC
DOIs
Publication statusPublished - Feb 2015

Keywords

  • DICB
  • MCM-41
  • Oxidation
  • SBA-15
  • TEMPO

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