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Download fileA Series of Two-Dimensional Metal−Organic Frameworks Based on the Assembly of Rigid and Flexible Carboxylate-Containing Mixed Ligands with Lanthanide Metal Salts
journal contribution
posted on 2007-10-03, 00:00 authored by Xing-Jing Zhang, Yong-Heng Xing, Zheng Sun, Jing Han, Yuan-Hong Zhang, Mao-Fa Ge, Shu-Yun NiuA series of lanthanide metal−organic frameworks, [Ln2 (Suc)0.5(BC)3(OH)2] (Ln = Tb (1), Eu (2), Sm (3), Pr (4);
H2Suc = succinic acid; HBC = benzoic acid), have been synthesized by the reaction of nitrate salts of Ln(III) with succinic acid
and benzoic acid under hydrothermal conditions and were characterized by elemental analysis, IR spectroscopy, and single-crystal
X-ray diffraction. X-ray diffraction analyses reveal that they exhibit the same two-dimensional (2D) architecture and crystallized in
triclinic space group P1̄ for complexes 1−4. Infinite inorganic walls were formed by lanthanide ions, μ3-OH, and an edge-sharing
“...Ln−O−C−O−Ln...” chain, which link to each other through the carbon atoms of the succinate anions on the [110] plane and
phenyl groups of the benzoic acid ligands on the [101] plane, leading to a two-dimensional open framework structure. The
thermogravimetric analysis of 1−4 and photoluminescent properties of 1 and 2 are discussed in detail.