期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 9, 期 16, 页码 3965-3973出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200204298
关键词
anion exchange; organic - inorganic hybrid composites; self assembly; supramolecular chemistry; tripodal ligands
Six noninterpenetrating organic-inorganic hybridized coordination complexes, [Mn(3)(2)(H2O)(2)]- (ClO4)(2)-2H(2)O (5), [Mn(3)(2)(H2O)(2)]- (NO3)(2) (6), [Mn(3)(2)(N-3)(2)]-2H(2)O (7), [Cu(3)(2)(H2O)(2)](ClO4)(2) (8), [Mn(4)(2)-(H2O)(SO4)].CH3OH.5H(2)O (9) and [Mn(4)(2)](ClO4)(2) (10) were obtained through self-assembly of novel tripodal ligands, 1,3,5-tris(1-imidazolyl)benzene (3) and 1,3-bis(1-imidazolyl)-5-(imidazol-1-ylmethyl)benzene (4) with the corresponding metal salts, respectively. Their structures were determined by X-ray crystallography. The results of structural analysis of complexes 5, 6, 7, and 8 with rigid ligand 3 indicate that their structures are mainly dependant on the nature of the organic ligand and geometric need of the metal ions, but not influenced greatly by the anions and metal ions. While in complexes 9 and 10, which contain the flexible ligand 4, the counteranion plays an important role in the formation of the frameworks. Entirely different structures of complexes 5 and 10 indicate that the organic ligands greatly affect the structures of assemblies. Furthermore, in complexes 5 and 6, the counteranions located between the cationic layers can be exchanged by other anions. Reversible anion exchanges between complexes 5 and 6 without destruction of the frameworks demonstrate that 5 and 6 can act as cationic layered materials for anion exchange, as determined by IR spectroscopy, elemental analyses, and X-ray powder diffraction.
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