Several layered perovskites can be readily manipulated by single-step topochemical reactions.  The extension of such topochemistry to a multistep approach beckons new strategies for the conscious design of fundamentally and technologically interesting materials.  Reductive intercalation followed by oxidative intercalation is one example of a viable multistep topochemical route. This strategy is effective in the construction of new alkali-metal halide and alkali-metal chalcogenide layers within receptive host compounds.  Herein, results from the use of this sequential intercalation method will be reported for the formation of alkali-metal chalcogenide layers within double- and triple-layered niobates ((A2ChH)LaNb2O7 and (A2ChH)Ca2Nb3O10, respectively; A = Rb, Cs, Ch = O, S). Details on the synthesis and characterization of this new series of compounds will be presented and the general utility of the synthetic approach discussed.

Multistep topochemical synthesis of alkali-metal chalcogenide double- and triple-layered perovskites

245th National Meeting (2013)

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