Solvothermal syntheses and crystal structures of two metal coordination polymers with double-chain structures |
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| Authors: | Qian Shi Rong Cao Dao-Feng Sun Mao-Chun Hong Yu-Cang Liang |
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| Affiliation: | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China |
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| Abstract: | Two polymeric complexes, [Cu2(btec)(phen)2]n·(H2O)n (1) and [Cd4(btec)2(phen)4(H2O)4]n (2) (H4btec=1,2,4,5-benzenetetracarboxylic acid; PHEN=1,10-phenanthroline), were synthesized by solvothermal reactions at 140 °C. Both complex 1 and 2 possess infinite double-chain structures, in which each Cu(II) center has a tetrahedral configuration and the Cd(II) centers adopt triangular prismatic and square-based pyramidal configurations simultaneously. The inter-chain face to face π–π interactions among the aromatic rings of phen and the hydrogen bond interactions between aqua molecules and carboxyl O atoms result in 3-D networks in the two complexes. The ESR spectra study of complex 1 shows that there is negligibly small long-range super-exchange interactions between the Cu(II) atoms via benzenecarboxylate bridging. |
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| Keywords: | 1,2,4,5-Benzenetetracarboxylate Copper(II) complexes Cadmium(II) complexes Double-chain Supramolecule |
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