Role of the B'-site metal ion on the framework structures and dielectric transitions in the host-guest type of cyanometalates (HIm)2[B'Co(CN)6] (HIm = imidazolium cation)†

The B'-site alkali metal ion (B' = Li, Na, K, and Rb) in a series of hexacyanocobaltate-based organic-inorganic hybrid compounds (HIm)2[B'Co(CN)6] (HIm = imidazolium cation) plays a key role to change the framework structures and the dynamic behaviours of the guest. As a result, the associated bulk dielectric properties are also changed.