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. Fr-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. (C) 2008 Elsevier B.V. All rights reserved