A novel hyperbranched aromatic polyamide containing bithiazole: Synthesis, metal complexation and magnetic properties

作者：Ding NengWen; Lin WeiHong; Sun WeiLin^*; Shen ZhiQuan

来源：Science China Chemistry, 2011, 54(2): 320-325.

DOI：10.1007/s11426-010-4211-9

• hyperbranched aromatic polyamide
• synthesis
• magnetic properties

Based on the polycondensation of bifunctional 2,2'-diamino-4, 4'-bithiazole(DABT) and trifunctional 1,3,5-benzenetricarbonyl trichloride (BTC), a novel hyperbranched aromatic polyamide PBD was synthesized with excellent solubility and good thermal stability. The structure of the polymer was confirmed by FT-IR and 1H NMR spectrum. The calculated degree of branching of our product was 52%. By exploring the influence of several different solvent systems, the yield of the polymer increased in the solvent system of DMAc/LiCl. Two kinds of metal complexes were obtained by chelation of the polyamide with Cu2+ and Ni2+, and the metal contents of the complexes were determined by complexometric titration. The magnetic behaviors of the complexes were examined as a function of magnetic field strength at 5 K, and as a function of temperature (5-300 K) at a magnetic field strength of 2.4 x 10(6) A/m. The results indicated that the complexes were soft ferromagnetic materials with Curie-Weiss temperature at 102 K and 53 K, respectively.

• 出版日期2011-2
• 单位浙江大学