Preparation and magnetic properties of novel supramolecular polymeric complexes containing bithiazole rings

Abstract

The preparation and magnetism of two supramolecular polymeric complexes, DABT/PAA-Ni 2þ and DABT/PAA-Cu 2þ , which were obtained via electrostatic interactions of 2,2 0 -diamino-4,4 0 -bithiazole (DABT), poly(acrylic acid) (PAA), and transition metal ions (Cu 2þ or Ni 2þ ) were described. FTIR, 1 H NMR, and elemental analysis were used to characterize the structures of the obtained supramolecular polymer and the corresponding complexes. The corresponding multilayer films were also constructed on the quartz substrate. UV-vis spectra and AFM images were applied to characterize these films. The result indicates a process of uniform assembling. The magnetic behavior was examined as a function of magnetic field strength at 4 K and as a function of temperature (4-300 K). It was found that DABT/PAA-Ni 2þ exhibits a ferromagnetic property with a high value of relative saturation magnetization, while DABT/PAA-Cu 2þ shows a special magnetic property different from the typical magnet.

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

“…Their lanthanide metal complexes exhibit features of soft ferromagnet. Lin et al [11] obtained two kinds of supramolecular polymeric complexes poly(acrylic acid), and transition metal ions via electrostatic interactions of 2,2′-diamino-4,4′-bithiazole, which showed a special magnetic property.…”