Low-temperature synthesis of perovskite solids LaMO3(M = Ni, Co, Mn)via binuclear complexes of compartmental ligand N,N′-bis(3-carboxysalicylidene)ethylenediamine

Abstract

A new method has been developed for the low-temperature synthesis of perovskite solids LaMO₃ where M = Ni, Co, Mn, using binuclear complexes of the ligand N,N′-bis(3-carboxysalicylidene)ethylenediamine (H₄fsaen). The thermal decomposition of such complexes was studied using a thermobalance. The solids that formed after thermal treatment from 400 to 1000 °C were characterized by X-ray diffraction. Using this method perovskites LaNiO₃, LaCoO₃ and LaMnO₃ have been synthesized at temperatures of ca. 500–600 °C. The above procedure yields solids with specific surface areas substantially higher than those obtained from ordinary ceramic methods, such as citrate and the nitrate routes.