Study of the Luminescent and Magnetic Properties of a Series of Heterodinuclear [ZnIILnIII] Complexes

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• 作者：Traian D. Pasatoiu ; Carmen Tiseanu ; Augustin M. Madalan ; Bogdan Jurca ; Carine Duhayon ; Jean Pascal Sutter ; Marius Andruh
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：July 4, 2011
• 年：2011
• 卷：50
• 期：13
• 页码：5879-5889
• 全文大小：1164K
• 年卷期：v.50,no.13(July 4, 2011)
• ISSN：1520-510X

文摘

Herein, we report the synthesis, structural investigation, and magnetic and photophysical properties of a series of 13 [Zn^IILn^III] heterodinuclear complexes, which have been obtained employing a Schiff-base compartmental ligand derived from o-vanillin [H₂valpn = 1,3-propanediylbis(2-iminomethylene-6-methoxy-phenol)]. The complexes have been synthesized starting from the [Zn(valpn)(H₂O)] mononuclear compound and the corresponding lanthanide nitrates. The crystallographic investigation indicated two structural types: the first one, [Zn(H₂O)(valpn)Ln^III(O₂NO)₃], contains 10-coordinated Ln^III ions, while in the second one, [Zn(ONO₂)(valpn)Ln^III(H₂O)(O₂NO)₂]路2H₂O, the rare earth ions are nine-coordinated. The Zn^II ions always display a square-pyramidal geometry. The first structural type encompasses the larger Ln ions (4f⁰鈥?f⁹), while the second is found for the smaller ions (4f⁸鈥?f¹¹). The dysprosium derivative crystallizes in both forms. Luminescence studies for the heterodinuclear compounds containing Nd^III, Sm^III, Tb^III, Dy^III, and Yb^III revealed that the [Zn(valpn)(H₂O)] moiety acts as an antenna. The magnetic properties for the paramagnetic [Zn^IILn^III] complexes have been investigated.