Syntheses and magnetic properties of novel bithiazole-containing polymericcomplexes

Three novel bithiazole-containing polymers were synthesized from 2,2'-diami no-4, 4'-bithiazole (DABT) condensed with bismaleimide, bis(methyloxycarbon yl ethyl)tin dichloride (BETD), and 4,4'-diphenylmethane diisocyanate (DPDI ), respectively. A new series of polymeric complexes were prepared from Fe2 + and the three polymers. These polymers and their complexes were character ized through FTIR, H-1-NMR, and related techniques. The chemical compositio ns of the complexes were determined by XPS. The presence of the exchange in teraction between the unpaired electrons was investigated by ESR spectrosco py. The magnetic behavior of these complexes was measured as a function of the magnetic field strength (0-40 kOe) at 5 K and as a function of temperat ure (5-300 K) at a magnetic field strength of 30 kOe. (C) 2001 John Wiley & Sons, Inc.