Abstract
New nanostructered layered inorganic–organic aluminum (Sil–Al) and magnesium (Sil–Mg) organosilicates – were prepared by a single step template sol–gel route under mild conditions, using a new alkoxysilane [(3-urea-dodecyl)propyl]triethoxysilane, containing embedded polar urea groups. The hybrids were characterized by elemental analysis, infrared spectroscopy, solid-state 29 Si, 13 C and 27 Al nuclear magnetic resonance and X-ray diffraction. The XRD data showed that the magnesium hybrid material exhibits a lamellar structure similar to talc, a natural inorganic silicate. In order to employ these alternative sorbent materials for solid phase extraction applications, the chemical stability of the hybrids were investigated over a wide pH range varying from 2 to 12.
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