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 language | English |
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Pages (from-to) | 4468-4474 |
Number of pages | 6 |
Journal | Chemistry of Materials |
Volume | 20 |
Issue number | 13 |
DOIs | |
Publication status | Published - 8 Jul 2008 |
Keywords
- mesoporous organic−inorganic hybrid material
- atom transfer radical grafting
- methacrylate monomers
- ATRP
- oligomethacrylates
- ligand structures
- chemical modification