Well-defined mesostructured organic-inorganic hybrid materials via atom transfer radical grafting of oligomethacrylates onto sba-15 pore surfaces

J. Moreno, D.C. Sherrington

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Well-ordered mesoporous organic−inorganic hybrid materials based on ATRP of methacrylate monomers inside SBA-15 pores have been synthesized maintaining the mesoporosity. Initially SBA-15 materials were funtionalised with the ATRP initiator by reaction of surface hydroxyl groups with (3-aminopropyl)-triethoxysilane (APTES) and 2-bromo-2-methylpropionyl bromide (BMPB); thus growth of oligomethacrylates occurred directly from the mesoporous walls. Two methacrylate monomers (MMA and GMA) and different monomer/initiator molar ratios (5/1 − 25/1) were tested. The characterization of the hybrid materials included N2 adsorption−desorption porosimetry, X-ray diffraction, 29Si MAS NMR, FT-IR spectroscopy, TEM and TG analysis. The results show that mesostructured hybrid materials with grafted oligomethacrylates maintain good porosity ( 0.4 cm3/g) and BET surface area ( 300 m2/g) with potential for use as catalyst components in chemical processes. The grafting of GMA-based oligomers is particularly important because the epoxide functionality allows further facile and versatile chemical modification, for example to introduce particular ligand structures and thence specific metal complexes.
Original languageEnglish
Pages (from-to)4468-4474
Number of pages6
JournalChemistry of Materials
Volume20
Issue number13
DOIs
Publication statusPublished - 8 Jul 2008

Keywords

  • mesoporous organic−inorganic hybrid material
  • atom transfer radical grafting
  • methacrylate monomers
  • ATRP
  • oligomethacrylates
  • ligand structures
  • chemical modification

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