Topochemical reactions are effective for directing structure and properties in various layered perovskites. Recent efforts in our group have focused on the investigation of reaction strategies based on intercalation as well as ion exchange. In one case, we have found that the use of reductive intercalation with alkali metals, followed by oxidative intercalation with chalcogen hydride gases, allows for the construction of alkali-metal chalcogen hydride layers within receptive hosts; Dion-Jacobson layered perovskites (e.g. RbLaNb2O7) for example can be manipulated to introduce RbSH layers within the interlayer. In terms of ion exchange, simple two-for-one reactions can be carried out with Ruddlesden-Popper layered perovskites; K2SrTa2O7 readily reacts with divalent transition metal ions to make new compounds of the form, MSrTa2O7 (M = Co, Zn). Details on these syntheses will be presented and the utility of such strategies discussed in terms of directed manipulations of solids.

Topochemical manipulation of layered perovskites

246th National Meeting (2013)

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