An ytterbium(II) complex with dimethyl ester of oxydiacetic acid.
An Yb(II) complex with dimethyl ester of oxydiacetic acid, [Yb(CH(3)OOCCH(2)OCH(2)COOCH(3))3](ClO4)2, has been obtained by electrochemical reduction and its crystal structure has been determined. The complex cations have the D3 (32) crystallographic symmetry. The compound shows a very broad absorption band, starting from 500 nm towards the UV region, and traces of luminescence with a maximum at 545 nm. The performed density functional theory (DFT) calculations have shown that the absorption band results from mixed f-d and charge transfer transitions, and the empty antibonding pi* orbitals of the ester groups quench the luminescence.
Starynowicz
Przemysław
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Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland. psta@wchuwr.pl