期刊
CRYSTENGCOMM
卷 13, 期 6, 页码 1984-1989出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ce00865f
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资金
- National Natural Science Foundation of China [20973133]
- Natural Science Foundation of Northwest University [PR10022]
- National base Science cultivate Fund of China [J0830417]
In this work, three structurally related aromatic polycarboxylic acids, 1,4-benzenedicarboxylic acid (H(2)bdc), 1,3,5-benzenetricarboxylic acid (H(3)btc), and 1,2,4,5-benzenetetracarboxylic acid (H(4)bttc), have been utilized as the ancillary ligands to perform a systematic study on the structure diversity of coordination polymer based on the Cobalt boolean AND 1,4-bis(imidazolyl)benzene matrix. The solvothermal reactions of Co(NO3)(2) with the aromatic acids and bib ligand afford three novel coordination polymers, [Co(bib)(bdc)](infinity) (1), {[Co-3(btc)(2)(bib)(2)(H2O)(2)](H2O)(2)}(infinity) (2), and {[Co-2(bttc)(bib)(2)](H2O)(2)}(infinity) (3). Compounds 1-3 illustrate a series of interpenetrating networks built up of different benzoate-bridging 1D chains. Owing to the different situation of the carboxylic group, the benzoates adopt bidentate linear, tridentate T-shaped and tetradentate double-track bridging modes to link metal centers into a W-type chain, ladder and double-center chain, respectively. These chains are further decorated by bib rods to afford a parallel interpenetrating (4,4) sheet for 1, and two three-fold interpenetrating alpha-Po networks based on different units for 2 and 3. The variety of structures and topologies indicates that aromatic acids play essential roles in the assembly of the final frameworks.
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