Preparation and magnetic properties of novel supramolecular complexes containing bithiazole rings

The preparation and magnetism of three supramolecular complexes, DABT-Ni2+/PAA, DABT-Cu2+/PAA and DABT-Fe2+/PAA, which were obtained via electrostatic interactions of the metal complexes of 2,2′-diaminos-4,4′-bithiazole (DABT-Ni2+, DABT-Cu2+and DABT-Fe2+) and poly(acrylic acid) (PAA) were described for the first time. FT-IR and elemental analysis were used to characterize the structures of the obtained materials. 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-Ni2+/PAA and DABT-Cu2+/PAA exhibit ferromagnetic properties, while DABT-Fe2+/PAA exhibits an antiferromagnetic property. The corresponding multilayer films were also constructed on the quartz substrate. UV–vis spectra and AFM images were applied to characterize these thin films. The result indicates a process of uniform assembling.