Abstract
We report transformations of the Ruddlesden−Popper (R−P) oxide, K2La2Ti3O10, to layered perovskite oxides, (Bi2O2)La2Ti3O10, MLa2Ti3O10 (M = Pb, Ba, Sr), and (VO)La2Ti3O10, by a novel metathesis reaction with BiOCl, MCl2, and VOSO4·3H2O, respectively. The formation of (VO)La2Ti3O10, which occurs in aqueous medium around 100 °C, suggests that the reaction is most likely topotactic, where the structural integrity of the perovskite sheet is preserved. We believe that the method described here provides a new general route for the synthesis/assembly of layered perovskite materials containing MX/M2X2 sheets, as indeed shown by the independent report of (CuX)LaNb2O7 synthesis by a similar reaction.
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