期刊
DALTON TRANSACTIONS
卷 39, 期 37, 页码 8646-8651出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c000180e
关键词
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资金
- Shanghai Commission for Science and Technology [06Pj14034, 06DZ19002, 10ZR1409700]
- Ministry of Education [106078]
- Shanghai education development foundation [2008CG31]
- Fundamental Research Funds for the Central Universities
The reaction of oxacalix[2] benzene[2] pyrazines 1 and 2 with copper(II) nitrate, as well as dimeric copper(II) tetraacetate are presented. Ligands 1 and 2, both adopt 1,3-alternate conformation, with the two exo-Lewis basic sites spatially oriented outwards. Ligand 1 reacts with copper(II) ions generated a discrete molecular cage 3 by bridging two ligands via two Cu2+ ions in the equatorial region. While the reaction of 1 with dicopper(II) tetraacetate unit resulted in the formation of a discrete supramolecular complex 4 with 1 : 2 stoichiometry between the dicopper(II) unit and ligand 1, due to the larger size and axial coordination mode of the dicopper(II) unit. The conformationally flexible nature of ligand 2 facilitated the formation of coordination polymers 5 and 6 upon interaction with copper(II) and dicopper(II) units, respectively. Coordination polymer 5 featured a zigzag structure of alternating ligand 2 and Cu2+ ion, while in coordination polymer 6, ligand 2 serves as an axial 2-connected node, propagating the paddlewheel dicopper(II) unit along the polymeric chain.
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