论文部分内容阅读
Three new coordination networks based on a versatile and unsymmetric building block 3-(sulfonyl-glycine)benzoic acid (H3L) ligand and inorganic Co(II) salt, [Co(HL)(bipy)2]· ClO4·1.5H2O (1), [Co3(L)2(H2O)6]·4H2O (2) and [Co(HL)(bpp)(H2O)2]·2H2O (3) (bipy = 2,2-bipyridine, bpp = 1,3-bi(4-pyridyl)propane), have been synthesized in aqueous media and structurally characterized by single-crystal X-ray diffraction. Reaction of Co salt with H3L afforded a neutral 1D alternating chain, which shows a 3-D supramolecular network through hydrogen bonds. When the auxiliary 2,2-bipyridine is used, a mononuclear unit is constructed; if using auxiliary ligand bpp, a neutral 1-D uniform chain is obtained and further extended into a 3-D supramolecular structure through versatile hydrogen bonds. The H3L ligand in 1 adopts a bidentate chelating coordination mode while that in 2 and 3 assumes a pentadentate bridging and a bis-monodentate bridging modes, respectively. This work and our previous work evidently demonstrate that the structures vary with altering the second ligands.
Three new coordination networks based on a versatile and unsymmetric building block 3- (sulfonyl-glycine) benzoic acid (H3L) ligand and inorganic Co (II) salt, [Co (HL) (bipy) 2] · ClO4 · 1.5H2O ), [Co3 (L) 2 (H2O) 6] 4H2O (2) and [Co (HL) (bpp) (H2O) 2] 2H2O (bipy = 2,2- bipyridine, bpp = 3-bi (4-pyridyl) propane, have been synthesized in aqueous media and structurally characterized by single-crystal X-ray diffraction. Reaction of Co salt with H3L afforded a neutral 1D alternating chain, which shows a 3-D supramolecular network through hydrogen bonds. When the auxiliary 2,2-bipyridine is used, a mononuclear unit is constructed; if using auxiliary ligand bpp, a neutral 1-D uniform chain is obtained and further extended into a 3-D supramolecular structure through versatile hydrogen bonds . The H3L ligand in 1 employs a bidentate chelating coordination mode while that in 2 and 3 assumes a pentadentate bridging and a bis-monodentate bridging modes, respectively. This work and our previous work evi dently demonstrate that the structures vary with altering the second ligands.