Dehydration of the nanoporous coordination framework Eriii[Coiii(CN)6]·4(H2O): single crystal to single crystal transformation and negative thermal expansion in Eriii[Coiii(CN)6]

Abstract

Desorption of bound and unbound water molecules from the nanoporous coordination framework Er^III[Co^III(CN)₆]·4H₂O to form the apohost, Er^III[Co^III(CN)₆], proceeds via a single crystal to single crystal transformation in which the Er(III) cations change from 8- to 6-coordinate; dehydration results in a striking change in the thermal expansion properties.