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Issue 11, 2002
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Hydrothermal synthesis and structural studies of novel 2-D lanthanide coordination polymers with phthalic acid

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Abstract

This paper presents four lanthanide coordination polymers, [Ln2(BDC)3(H2O)]n (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3; BDC = 1,2-benzenedicarboxylate) and [Yb4(BDC)6(H2O)2]n (4) prepared by the hydrothermal technique. They are all 2-D infinite structures with BDC anions connecting adjacent metal ions. In complex 1, La(III) ions are eight- and nine-coordinated, and all La(III) ions are coplanar in the 2-D structure. In complexes 2 and 3, Eu(III) and Tb(III) ions are also eight- and nine-coordinated, but they are distributed in a wave-like 2-D network. In complex 4, the Yb(III) ions have four different coordination numbers (6, 7, 8 and 9), which are rarely found in one lanthanide complex. Both the coordination numbers and the arrangement of Ln atoms in these coordination polymers show the lanthanide contraction. In the four complexes, all the oxygen atoms of BDC take part in coordination with Ln(III) ions, adopting tetra-, penta- and hexadentate coordination modes for the phthalate anions. The luminescent properties of complex 2 have been investigated and the results for the explanation of the chemical environment of the Eu(III) ion are consistent with the X-ray analysis.

Graphical abstract: Hydrothermal synthesis and structural studies of novel 2-D lanthanide coordination polymers with phthalic acid

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Publication details

The article was received on 27 Jun 2002, accepted on 28 Aug 2002 and first published on 18 Oct 2002


Article type: Paper
DOI: 10.1039/B206280C
Citation: New J. Chem., 2002,26, 1590-1596
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    Hydrothermal synthesis and structural studies of novel 2-D lanthanide coordination polymers with phthalic acid

    Y. Wan, L. Jin, K. Wang, L. Zhang, X. Zheng and S. Lu, New J. Chem., 2002, 26, 1590
    DOI: 10.1039/B206280C

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