A novel bithiazole-containing polymeric complex with soft ferromagnetism

A novel polymer resulting from the polycondensation of 2,2'-diamino-4,4'-bithiazole (DABT) with 5,5'-methylene-bis-salicylaidehyde (MBSA) and its ferric complex are described. Analyses of Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) revealed that both bithiazole residue and Schiff-base moiety acted as coordination sites for Fe 31 ions in the polymeric matrix. The magnetic behavior of the complex was studied as a function of magnetic field strength (0-60 kOe) at 25 K and as a function of temperature (5-300 K) at a magnetic field strength of 30 kOe. The hysteretic loop was measured at 5 K for the complex showing coercivity (H-c) of 20 Oe and remnant magnetization (M-r) of 0.002 emu/g, which is much lower than those of bithiazole-based polymeric complexes previously reported. The results indicated that the present complex is of the typical characteristics of a soft ferromagnet. Copyright (c) 2005 John Wiley & Sons, Ltd.