A New Organic-Inorganic Hybrid Nanocomposite, BEDT-TTF Intercalated into Layered FePS3

A new inorganic–organic hybrid compound, Fe0.76PS3(BEDT-TTF)0.48 (BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene), has been synthesized by the reaction of the pre-intercalate Fe0.90PS3(Phen)0.41 (phen=1,10-phenanthroline) with (BEDT-TTF)2Ix. The powder X-ray diffraction (XRD) results show that the expansion of the lattice spacing (Δ d) is about 4.0 Å compared with the pristine FePS3, indicating that the molecular ring plane of the guest is parallel to the layer of the host. The infrared spectrum of the intercalate shows the existence of BEDT-TTF as a guest between the interlayer region of the layered FePS3. The room-temperature electrical conductivity of the compressed pellet of Fe0.76PS3(BEDT-TTF)0.48 is about 10−7 S/cm, which is in the same order of magnitude as that of the pristine FePS3(10−7 S/cm). The magnetic properties measured with a SQUID-magnetometer indicate that Fe0.76PS3(BEDT-TTF)0.48 exhibits the paramagnetism from 120 to 300 K and Curie-Weiss Law was obeyed above 140 K, but a strong antiferromagnetic phase transition occurs at TN of 100 K.