Abstract
Two types of copper-lanthanide heterometallic coordination polymers (CPs) [Ln2Cu3(2,3-pydc)6(H2O)6]·xH2O [Ln = La (1, x = 8), Nd (3, x = 10), 2,3-H2pydc = pyridine-2,3-dicarboxylic acid] and [Ln2Cu2(2,3-pydc)4(NO3)(OH)(H2O)6]·2H2O [Ln = La (2), Nd (4)] were successfully synthesized by one-pot reaction under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction. CPs 1–4 exhibit two kinds of three-dimensional (3D) structures with different topologies. In 1 and 3, the Cu(2,3-pydc)2 and Ln2(COO)4 units link each other to form a two-dimensional (2D) layer, and the adjacent 2D layers are extended by the Cu(2,3-pydc)4 units into a 3D framework with one-dimensional (1D) channels. In 2 and 4, the LnIII ions bridge the 1D chains based on 2,3-pydc and CuII into a 2D layer, and the nitrate and hydroxyl anions connect the adjacent 2D layers to generate a 3D framework with 1D channels. The electrochemical properties of 1–4 were studied.
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