Synthesis and characterization of ureidopropyl-MSU-X silica

Ureidopropyl-incorporated MSU-X (U-MSU-X) and bi-functionalized MSU-X silic a materials containing ureidopropyl along with methyl (M-U-MSU-X) or phenyl (Ph-U-MSU-X) were synthesized by a "one-pot" co-condensation from monomeri c silicon sources such as tetraethylorthosilicate and ureidopropyltriethoxy silane (UTES), methyltriethoxysilane, phenyltriethoxysilane. The so-produce d materials were characterized by X-ray diffraction, FT-IR, (SiNMR)-Si-29, HRTEM, thermogravimetry analysis, N-2 adsorption, bulk element analysis and synchrotron radiation small angle X-ray scattering. The surface and textur e properties varied with the content of UTES and the change of organosiloxa nes and the organic groups were distributed uniformly in the organo-MSU-X c hannels and formed interfacial layers. (C) 2001 Elsevier Science B.V. All r ights reserved.