A novel bithiazole oligomer containing C 60 and its ferro-complexes: syntheses and magnetic properties

A novel bithiazole oligomer (PCBT) was synthesized from C60 and the diazo salt of 2,2′-diamino-4,4′-bithiazole (DABT). Its ferro-complex (PCBT-Fe2+) was prepared from PCBT and FeSO4 in DMSO solution under a purified nitrogen atmosphere. The magnetic behavior of PCBT and PCBT-Fe2+ was measured as a function of magnetic field strength (0–60 kOe) at 5 K and as a function of temperature (5–300 K) at a magnetic field strength of 30 kOe. PCBT-Fe2+ complex exhibits a hysteresis cycle at 5 K, the observed coercive field (HC) and remnant magnetization (Mr) are 690 Oe and 0.12 emu/g, respectively. The results show that PCBT is an anti-ferromagnet and its Fe2+-complex is a soft ferromagnet.