Synthesis, Characterization And Properties Based On The Porous Carboxylate Complexes

In recent years, many research groups at home and abroad in carboxylates synthesis, design and application development are studied deeply. But the current study focused on rigid ligand for carboxylic acid, carboxylic acid ligands containing flexible chain coordination polymer synthesis, structure and properties of the reports.Carboxylic acid ligands containing flexible chain, wherein the benzoic acid carboxyl groups in the rigid group, is formed with excellent ligand porous complexes, and Which connected to benzene ring oxygen alkyl carboxylic acid chain containing flexible groups, spatial configuration and changeable, plasticity and strong features, the unique properties of these structure determines the special status of ligands containing carboxylic acid flexible chain in the supramolecular polymers. In this paper, a series of rigid carboxylic ligands with flexible chains are synthesized, and self assemble with the transition metal ions, so as to form the complexes with porous structure, the results are summarized as follows:1 、 In 3,5- two hydroxy benzoic acid, p-hydroxybenzoic acid, p-hydroxybenzaldehyde, 2-hydroxybenzaldehyde, p-aminobenzoic acid, 5-hydroxy benzene two formic acid, hydrazine hydrate, bromide, bromide acetic acid as raw materials, seven kinds of carboxylic acid ligands were synthesized: 3,5- two carboxyl methoxy-benzoic acid(L1);5-carboxymethoxy- benzene two formic acid(L2); 4- carboxyl methoxy- benzoic acid(L3); 4-(4- carboxymethoxy-benzylideneamino) benzoic acid(L4); 4- carboxyl methoxy benzaldehyde by hydrazine bis Schiff base(L5); 4-(carboxymethoxy 2-- benzylideneamino) benzoic acid(L6); 2- carboxyl methoxy benzaldehyde by hydrazine bis Schiff base(L7). The product was characterized by nuclear magnetic resonance spectroscopy, infrared spectroscopy, X- ray diffraction.2、Using the natural evaporation method, hydrothermal synthesis method, ether diffusing method, using the designed synthesis of carboxylic acid ligand(L1~L7) and transition metal ions(Cd2+, Cu2+, Ni2+, Zn2+, Co2+, Mn4+, Ag+, Fe3+) for the synthesis of the complexes,the complexes were characterized by infrared spectroscopy; and by changing the metal to ligand ratio, reaction temperature, p H value, solvent, addition of the second ligand(p-aminobenzoic acid, m-aminobenzoic acid, 1,10- bipyridine, phenanthroline 4,4-, 1,3,5- all three formic acid 3,5- pyridine carboxylic acid, two) and other methods, try to synthesize a porous coordination polymer. The complexes were characterized by IR, This paper synthesized three by second amino benzoic acid(ABA) ligand complexes constructed: [Cd(H2O)(p-ABA)2]-2(H2O))(complex1), [Ag2(p-ABA) 2]n(complex 2), [Ag(m-ABA)(m-HABA)](complex 3); one by 1,10-phen build complex [Cd4(NO3) 2(1,10-phen) 8]6+·6(OH)·26(H2O)(complex 4), the complexes(1) 、the complexes(2) the thermal stability was studied.3、The two by methyl viologen in assembly with porous structure were the mode of action of trimesic acid and cadmium(II) coordination polymer, thermal stability and adsorption properties were investigated.