Network diversity and supramolecular isomerism in copper(II)/1,2-bis(4-pyridyl)ethane coordination polymers |
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| Authors: | Katerina N LazarouVassilis Psycharis Aris TerzisCatherine P Raptopoulou |
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| Institution: | Institute of Materials Science, NCSR “Demokritos”, 15310 Aghia Paraskevi Attikis, Greece |
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| Abstract: | Reactions of copper(II) sources with 1,2-bis(4-pyridyl)ethane (bpe) yielded metal-organic networks with diverse topologies and dimensionalities. Compounds Cu(bpe)2(dmf)2]n(ClO4)2n·2ndmf (1·2ndmf), Cu(bpe)2(dmf)2]n(ClO4)2n·3.5ndmf (2·3.5ndmf), Cu(bpe)2(NO3)2]n·2nH2O (4·2nH2O) and Cu2(bpe)(O2CMe)4]n·0.7nH2O (5·0.7nH2O) have been isolated by altering the copper(II) source, the reaction solvent and the crystallization process. Compounds 1·2ndmf and 2·3.5ndmf consist of cationic Cu(bpe)2(dmf)2]2+ repeating units assembled to 1D and 2D (4,4) networks, respectively, and represent supramolecular isomers due to the conformational isomerism of the bridging bpe molecules. Compound 4·2nH2O consists of neutral mononuclear Cu(dpe)2(NO3)2] repeating units assembled to inclined interpenetrating (4,4) sheets describing an overall entanglement that is 3D in nature, and compound 5·0.7nH2O consists of neutral dinuclear repeating units assembled to cross-linked 1D chains. |
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| Keywords: | 1 2-Bis(4-pyridyl)ethane Coordination polymers Copper(II) complexes Supramolecular isomerism |
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