A STRUCTURAL STUDY OF AMORPHOUS ALKOXIDE-DERIVED LEAD TITANIUM COMPLEXES

We studied amorphous lead titanium alkoxide-derived heterometallic com plexes, prepared from lead acetate and titanium n-propoxide or n-butox ide in parent alcohol medium. According to gas-liquid chromatography ( GLC) and thermogravimetric analysis with mass spectrometry of evolved species (TGA/EGA) analyses, the type of alkoxide group influences oxo or acetate bridging, as well as the amounts of hydroxyl and organic gr oups bound to the metal network. From XANES and EXAFS analysis, local environments of lead and titanium atoms were determined within the ana lyzed range of 3.4 Angstrom. Local environments depend weakly on the t ype of alkoxide used. Titanium atoms are pentacoordinated. A Pb-Ti cor relation is established with lead atoms bound to titanium atoms by oxy gen linkages.