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Journal of Coordination Chemistry

Year: 2010  |  Volume: 63  |  Issue: 1  |  Page No.: 36 - 45

Supramolecular networks constructed from mono- and bi-nuclear lanthanide complexes with 1,2-phenylenedioxydiacetic acid

Yong Jiang, Xiao-Shuo Wu, Xia Li, Jin-Hao Song and Ying-Quan Zou

Abstract

[Tb2(1,2-pdoa)3 · 6H2O] · H2O (1) and [La(1,2-pdoa)(1,2-H2pdoa)(OH) · H2O] · 5H2O (2) (1,2-H2pdoa = 1,2-phenylenedioxydiacetic acid) have been synthesized and structurally characterized by single crystal X-ray diffraction. Complex 1 is a binuclear molecule in which one 1,2-pdoa ligand is a tetradentate bridge linking two Tb3+ ions, the other two 1,2-pdoa ligands bond Tb13+ and Tb1A3+ via tetradentate chelating coordination. Tb3+ is nine-coordinate by six oxygens of 1,2-pdoa and three waters. Complex 2 is mono-nuclear with La3+ ten-coordinate by eight oxygens of two 1,2-pdoa, one hydroxide and one water. 1,2-Pdoa is tetradentate chelating with La3+ ion. The packing diagrams of 1 and 2 show supramolecular networks via H-bonds. The fluorescence spectrum of 1 shows characteristic emission of Tb3+ with 5D47Fj (j = 6-3) transitions.

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