The Synthesis, Characterization and Properties of Transition Metal Coordination Complexes Monomer and Co-Polymer
|Keywords||Transition metal Coordination compounds Condensation polymerization Polyamide copolymer UV absorption|
In recent years, in the field of preparation of new materials, inorganic - organic polymer hybrid materials by a high degree of attention. Exhibit unique properties of metal-polymer complexes both inorganic metal and polymer materials characterized in terms of electrical, optical, magnetic, and has broad application prospects and value makes them in many other areas, the development of new composite materials has a very important significance. Therefore, research in this area is very active, form a polymer chemistry and coordination chemistry of mutual penetration of the frontier. The bonded metal-polymer complexes are stable small molecules with the polymer was monomers formed by polyaddition or polycondensation reaction complexes, having a clear structure. However, the synthesis of such polymer complexes requires small molecules that participate in the reaction complex monomers with reactive groups, but also to have a certain degree of solubility or thermal stability, and so on form of bonded synthetic metal polymer complex is relatively less. The synthesized two having a polycondensation of active transition metal complexes monomer Yamazaki phosphine acylating polymerization system, with other monomers, the main choice of a copolycondensate obtained metal bond-type polymer polyaramide monomer complexes and the polymer structure and the nature of, and provides a theoretical and practical foundation for spinning and function of membrane material. The first part of this paper is the choice of the transition metal copper and cobalt as central ion, both of the aromatic carboxylic acid - the amino acid and p-hydroxy benzoic acid as a ligand, the three kinds of small molecules are synthesized transition metal complexes. By elemental analysis, infrared spectroscopy (IR), and X-ray diffraction to determine its crystal structure, and by means of UV-visible spectroscopy, and thermal gravimetric analysis to explore the complex nature of the ultraviolet properties and thermal stability. The results showed that, after the formation of the coordination of the amino acid with cobalt ions coordination polymers can not be used as a metal complex monomer to the next step polymer reaction; amino acid and p-hydroxybenzoic acid and copper ion ligand future small molecule transition metal complex monomers respectively formed on both sides of the left activated carboxyl group and the reactive hydroxyl groups may be further reacted to form the bond-type polymer complex. The second part of this paper is to select the the the copper complexes monomer amino acid ([Cu (NH 2 C 6 H 4 COOH) < sub> 2 Cl 2 ]) and p-phenylenediamine, m-phenylenediamine monomers by polycondensation reaction to form a metallic copper-containing polyaramide, but its molecular weight is low; by adding third monomer terephthalic acid copolymer can increase the molecular weight of the polymer; metallic element analysis, infrared spectroscopy, 1 sup> H NMR of the composition and structure of the polymer were characterized; discussed amino copper benzoate complexes monomer - Phenylenediamine - terephthalate copolymer characteristics of viscosity varies with the monomer concentration, reaction temperature, the influence of the amount of condensing agent and complexes of monomer content and other factors, to determine a reasonable reaction conditions ; and do the relevant thermal properties, the ultraviolet absorbing performance study. The results show that the dissolution performance compared with a similar structure in the copolycondensate formed after the transition metal complexes monomer polyaramide PPTA; benzenediamine monomer after the switch to further improve the solubility, and can be a medium molecular weight poly aryl amide, which is favorable for deposition, can be used for the development of new membrane materials; introduced so that the polymer complexes ultraviolet performance was improved, and can be used as a good UV protective material.