A HETEROTETRANUCLEAR ZINC(II)-CERIUM(IV) SALAMO COMPLEX POSSESSING DECA-AND DODECA-COORDINATED CERIUM(IV) ATOMS: SYNTHESIS,STRUCTURE,AND PHOTOPHYSICAL PROPERTIES

摘要

A heterotetranuclear zinc(II)-cerium(IV) complex [(ZnL)2Се(ОАс)2][Се(NО3)6]·Ру (H2L = 6,6'-methoxy-2,2'-[1,2-ethylenedioxybis(nitrilomethylidyne)]diphenol and Py = pyridine) is successfully prepared by a one-pot reaction of a Salamo-type ligand H2L with Zn(OAc)2·2H2O,Се(NO3)3·6Н2O,and an auxiliary ligand Py.The Zn~(II)-Ce~(IV) complex consists of one dicationic [(ZnL)2Ce(OAc)2]~(2+) unit with a deca-coordinated Ce~(IV) atom,one [Се(NО3)6]~(2-) dianionic unit with a dodeca-coordinated Ce~(IV) atom,and one uncoordinated Py molecule.Interestingly,the two Ce~(IV) atoms are positive tetravalent,which may probably be due to the oxidation of trivalent Ce~(III) atoms during the reaction.Moreover,the photophysical properties of the Zn~(II)-Ce~(IV) complex are studied.