Synthesis, characterization and magnetic properties of transition metal salen complexes intercalated into layered MnPS3

Three new intercalation compounds based on the cationic complexes [M(salen)]+ (M = Mn3+, Fe3+, Co3+; salen = N,N′-ethylene-bis(salicylaldimine)) and the layered MnPS3 have been synthesized and characterized by XRD, IR, TGA and elemental analysis. Compared with pure MnPS3, the lattice expansion (Δd) of 9.6–9.7 Å for [Fe(salen)]0.56Mn0.72PS3·0.5H2O and [Mn(salen)]0.26Mn0.87PS3·0.5H2O indicates that the guest molecular is arranged with its C2 axis in a titled way to the host layer. While [Co(Salen)]0.70Mn0.65PS3·H2O was expanded by about 14 Å suggesting that the guest is arranged in another way with its C2 axis parallel to host layer. Their magnetic properties were studied with SQUID. The intercalate [Fe(salen)]0.56Mn0.72PS3·0.5H2O and [Mn(salen)]0.26Mn0.87PS3·0.5H2O exhibit magnetic transition from paramagnetism to ferrimagnetism at about 35 K. However, [Co(salen)]0.70Mn0.65PS3·H2O only exhibits paramagnetism in the whole range of the measured temperature. All three intercalates do not show spin crossover behavior.