Various coordination architectures constructed from N-[(carboxyphenyl)-sulfonyl]glycine: Structural variation via ligand isomerism effects and metal-directed assembly

摘要

Using Cu(II), Mn(II) or Co(II) salt and the flexible ligands, N-[(4-carboxyphenyl)-sulfonyl]glycine (H3L1) and N-[(3-carboxyphenyl)-sulfonyllglycine (H3L2), a series of new coordination polymers, [Mn(phen)-(H2O)(4)][HL1] (1), [Co-3(L-1)(2)(bipy)(3)(H2O)(6)](n)center dot 8nH(2)O (2), [Cu-4(L-1)(2)(OH)(2)(bipy)(4)](n)center dot 12nH(2)O (3), [Na(H2L1)(H2O)](n) (4). [Mn-2(HL2)(2)(dpe)(3)(H2O)(2)](n) ndpe (5), (phen = 1,10-phenanthroline, bipy = 4,4'-bipyridine, dpe = 1,2-di(4-pyridyl)ethylene), varying from OD to 3D, have been synthesized and structurally characterized. Compound 1 has a [Mn(phen)(H2O)(4)](2+) cation and a HL12- anion. Compound 2 features a new 1D triple chain, based on octahedral cobalt atoms bridged by bipy molecules and terminally coordinated by two H3L1 ligands. Compound 3 has a 2D layered structure, constructed from new alternating chains where H3L1, hydroxyl and water molecules simultaneously act as bridging ligands. Compound 4 possesses a bilayer structure in which two adjacent layers are pillared by H3L1 ligands into a 2D bilayer network. Compound 5 is a unique 3D coordination polymer in which each Mn center binds two trans-located dpe molecules. The thermal stability as well as magnetic properties of S was also studied. This work and our previous work indicate that the positional isomer of the anionic N-[(carboxyphenyl)-sulfonyl]glycine is important in the construction of these network structures, which are also significantly regulated by the metal centers.