| In recent years, organic-inorganic composites or hybrids have attracted extensive attention in the field of material chemistry. The incorporation of metal atoms into synthetic polymer chains leads to macromolecular structures in which metals are not only incorporated via the use of traditional covalent bonds but also by potentially reversible coordination interactions. Metal-containing polymers display unique electrical, optical, magnetic propertie, generating a new and versatile class of functional materials. But there is little study focused on bonding-type metal macromolecular complex, which is known for their clear structure. Because there are some special requirements for the metal containing monomers, such as good solubility or thermal stability.In our work, transition metal coordination complex monomers with active groups for polycondenstation ware prepared, fristly. Then novel metal-containing polyamides were synthesized by co-polycondensate the coordination complex monomers with other monomers in N-methyl-2-pyrrolidone (NMP) with triphenyl phosphite and pyridine as condensing agents. The structure and characterization of complexes and co-polymers were studied.Firstly, three new transition metal coordination complexes [Co(NH2C6H4COO)2(H2O)3](1), [Cu(NH2C6H4COOH)2Cl2](2) and {[Cu(HOC6H4COO)2(NH3)2H2O]4H2O}(3) have been preperd by the reaction of Co(NO3)2·6H2O, CuCl2·2H2O and two functional ligands, p-aminobenzoic acid p-hydroxybenzoic acid. The complexes have been fully characterized by elemental analysis, IR, TG, UV and single crystal X-ray diffraction. The thermal stability and UV absorbility of complex (2) was studied. Experimental results showed that the complex (1) is a kind of coordination polymer, formed by self-assembly of transition metal and organic ligand. The Cu-complex (2) containing carboxylic groups and the Cu-complex (3) containing hydroxyl groups have strong potential as a monomer for the synthesis of metal-containing polyamide.Secondly, novel metal-containing polyamides were synthesized by the polycondensation of complex (2) monomer containing carboxylic group and two aromatic diamine monomers, p-phenylene diamine and m-phenylene diamine, respectively. The introduction of p-phthalic acid unit into aromatic polyamide backbones would be expected to get a highter molecular weight. The structure and property of transition metal-containing polymers were characterized by elemental analysis, IR, 1H NMR, TG, UV and inherent viscosity. Then influencing factors of inherent viscosity of the co-polyamides reacted with complex (2) monomer, m-phenylene diamine and p-phthalic acid were investigated in detail. The results show that the prepared polyamides have increased solubility because of the presence of complex unit. By introduction of m-phenylene diamine in these aromatic polyamides makes them soluble in several polar aprotic solvents because of strong intermolecular interactions, and the polymers were produced with high yields and moderate viscosities, which indicated that the co-polyamides could be proposally used as films, fibers or other applications. It revealed the UV absorption properties of co-polyamides have been enhanced significantly by the incorporation of Cu-complex unit into the polymer chains. Thus, the metal-containing polyamide may be used as new UV protection polymeric materials.
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