Synthesis of novel copolymers containing tri(ethylene oxide) segments and bithiazole rings on the backbone and magnetic properties of their complexes

Two novel copolymers containing bithiazole rings and ethylene oxide on the skeleton (PPOBTz and PNOBTz) were synthesized via Schiff reaction and Ullmann reaction, respectively. The copolymers were characterized by FTIR, 1H NMR. Their polymeric complexes with Cu2+ and Nd2+ were prepared. The magnetic behavior of these polymeric complexes was measured as a function of magnetic field strength (0–60 kOe) at 4 K and as a function of temperature (4–300 K) at a magnetic field strength of 30 kOe, indicating that they all exhibited features of soft ferromagnet.