XPS, NMR and FTIR structural characterization of polysiloxane-immobilized amine ligand systems

The polysiloxane-immobilized monoamine ligand systems were made by hydrolytic polycondensation of Si(OEt)(4) and (EtO)(3)Si(CH2)(3)NH2. These materials were examined by XPS, FTIR and NMR techniques. The analysis indicates that the amine ligand groups almost exist in the free form in the alkaline media and in the cation form in the acid media. C-13 NMR and FTIR spectra combined with the XPS results shows that there is some leaching of small oligomeric ligand containing groups from the siloxane network. (C) 2000 Elsevier Science B.V. All rights reserved.