Synthesis and structural characterization of lanthanide oxalate-oxydiacetate mixed-ligand coordination polymers {[Ln(oda)(H2O)x]2(ox)}n (x = 3 for Ln = La, Ce, Pr, Gd, Tb and x = 2 for Ln = Er)

Author： Wen Yong-Hong   Wu Xiao-Hui   Bi Sai   Zhang Shu-Sheng  

Publisher： Taylor & Francis Ltd

ISSN： 0095-8972

Source： Journal of Coordination Chemistry, Vol.62, Iss.8, 2009-01, pp. : 1249-1259

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Abstract

Reactions of oxydiacetic acid (H2oda) with lanthanide oxide, nitrate, chloride, and carbonate gave six lanthanide oxalate-oxydiacetate mixed-ligand coordination polymers {[Ln(oda)(H2O)x]2(ox)}n [x = 3 for Ln = La, Ce, Pr, Gd, Tb, (1-5), and x = 2 for Ln = Er (6)]. Oxydiacetic acid is decomposed into oxalic acid in this reaction. In the crystal structures of 1-6, oxydiacetate and the lanthanides build a chain, and the oxalate groups bridge two chains to form 1-D double-chain ladder-shaped structures, connected by intermolecular hydrogen bonds to form a 2-D network structure. These compounds contain approximately 3.0 × 6.4 Å2 channels along the c-axis. The infrared spectra and thermal behaviors of 1-6 are also investigated.

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