[Zurück]


Zeitschriftenartikel:

M. Bauer, C. Gastl, C. Köppl, G. Kickelbick, H. Bertagnolli:
"EXAFS Spectroscopy of the Alkoxide Precursor Zr(OnBu)4 and its Modification in Solution";
Monatshefte für Chemie, 137 (2006), S. 567 - 581.



Kurzfassung englisch:
The molecular structure of the transition metal alkoxide Zr(OnBu)4 in toluene and its modification by addition of i-propanol, tetrahydrofurane, and the coordinating ligand pentane-1,3-dione (Hacac) were investigated by extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) spectroscopy. Zr(OnBu)4 dissolved in toluene forms dimers. It was proved that cluster size is a function of the number of added equivalents ligand. In contrast, the addition of i-propanol or tetrahydrofurane caused no structural changes observable by EXAFS spectroscopy. A detailed discussion of the structural models is given in terms of possible alternatives and errors within the EXAFS analysis.

Schlagworte:
EXAFS spectroscopy; Transition metal alkoxides; Aggregation; Structure elucidation.

Erstellt aus der Publikationsdatenbank der Technischen Universitšt Wien.