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A Series of Lanthanide−Transition Metal Frameworks Based on 1-, 2-, and 3D Metal−Organic Motifs Linked by Different 1D Copper(I) Halide Motifs

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posted on 26.11.2007, 00:00 by Jian-Wen Cheng, Shou-Tian Zheng, Guo-Yu Yang
Hydrothermal reactions of lanthanide(III) oxide and copper halide with isonicotinic acid (Hina) and pyridine-2,3-dicarboxylic acid (H2pdc) or 1,2-benzenedicarboxylic acid (H2bdc) lead to three novel lanthanide(III)−copper(I) heterometallic compounds, namely, [Ce2(ina)5(na)2(H2O)2][Cu5Br4] (1, na = nicotinic acid), [Er4(ina)8(bdc)2(OH)(H2O)5][Cu8I7] (2), and [Ce3(ina)8(bdc)(H2O)4][Cu7Br6] (3). Compound 1 is constructed from two distinct units of the Ln−organic double chains and inorganic [Cu5Br4]nn+ chains. Compound 2 consists of 2D Ln−organic layers and 1D [Cu8I7]nn+ cluster chains. Compound 3 can be viewed as a 1D [Cu6Br6]n chainlike motif inserted into the channels of a 3D Ln−Cu−organic motif. Compounds 13 exhibit three different 1D inorganic copper(I)−halide chains interconnected with metal−organic 1D chains, 2D layers, and 3D nets resulting in three mixed-motif non-interpenetrating heterometallic Cu−halide−lanthanide (Ln)−organic frameworks, which represent good examples and a facile method to construct such mixed-motif heterometallic compounds. Furthermore, the IR, TGA, and UV−vis spectra of 13 were also studied.