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Pyridine carboxylic acid because of its strong and diversity of the ligand coordination mode is considered to be a good ligand; pyridine carboxylic acid ligand polymers also exhibit a variety of good properties, such as: electrical properties of non- linear optical properties, catalytic properties, magnetic properties. In summing up the papers 2,4 - of pyridine acid or 2,5 2,4 - pyridine acid and 2,5 - the pyridine acid literature review on the basis of the hydrothermal method and solution method synthesis of eight - pyridyl acid with a transition metal ion, a combination nitrogenous second novel structure of the ligand (bpe, phen, 4,4 '-bpy, bpp, imi, 2,2'-bpy, 2,4 '-bpy) complex crystal: [Zn 2 (bpe) (H 2 O) 6 (2,4-pydc) 2 ] · 2 (H 2 O) (1), [Mn 2 (phen) 2 (H 2 O) 2 (2,4-pydc) 2 ] · 4 (H 2 O) (2), [Mn 2 (4,4 '-bpy) (H 2 O) 6 (2,4-pydc) 2 ] · 2 (H 2 O) (3), {[Co 2 (C 26 H 24 N < sub> 4O ) (2,4-pydc) 2 ] 2 · H 2 O} n (4), [ Co (2,4-pydc) (2,4-pydcH) (H 2 O) 2 (imi)] · H 2 O (5), {[Cu 3 (2,2 '-bpy) 2 (H 2 O) 2 (2,4-pydc ) 2 (2,4-pydcH) 2 ] · 2 (H 2 O)} n (6), {Cu (4, 4'-bpy) (2,4-pydc) · 6.5H 2 O} n (7), {[Co (2,4 '-bpy) 2 (2,5-pydc) ( H 2 O)] · 2.5H 2 O} n (8) (2,4-pydcH 2 = 2,4 - pyridinedicarboxylic the acid-,2,5-pydcH 2 = 2,5 - pyridine acid, 2,2 '-bpy = 2,2' - bipyridine, 4,4 '-bpy = 4,4' - bipyridine, 2,4 '-bpy = 2,4' - bipyridine, phen = phenanthroline morpholine bpe = 1,2 - two (4 - pyridyl) ethane, bpp = 1,3 - two ( 4 - pyridyl) propane, imi = imidazole). The test of crystal structure, more than eight complexes by elemental analysis, IR, TG, and other means of characterization of the nature of it. Addition of the fluorescent properties of complexes 1, 2 and 8 of the magnetic properties of complex testing and analysis. Obtained according to the X-ray diffraction data showed that, in the synthesis of eight crystal complexes 1,2,3 small molecular structure of the dual-core; the complexes 5 for monocytes small molecule structure; complexes 4,7 The three-dimensional network structure; complexes 6,8 for the one-dimensional chain structure. Π-π stacking interactions between the aromatic ring complexes in two adjacent phen ligand. Complex nitrogen-containing second ligand 4 bpp occurred coupling the bpp coupling of two molecules in the process of forming the complexes become molecule tetradentate C26H24N4O ligand (L ligand). The complexes 7 for a porous structure of complexes, its structure in the presence of 8? × 11? Microporous. The complexes 8 has a zigzag chain structure. There are different degrees of intermolecular hydrogen bonds in the crystal structure. The fluorescence data of the complexes having a potential value of luminescence applications. Complexes to 2 and 8, the magnetic properties of the study showed that both complexes have shown the antiferromagnetic interaction.
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