Download citation
Acta Cryst. (2014). A70, C1225
Download citation

link to html
Dicyanometallate coordination polymers show a number of desirable properties: piezoelectricity, record-breaking negative thermal expansion (NTE) and negative linear compressibility (NLC), vapochromism, and luminescence. Despite this, the rules governing the structural trends arising from the use of this roughly 10 Å linker, [M(CN)2]- where M = Cu, Ag, or Au, are relatively poorly explored. This talk is concerned both with mapping the composition-connectivity relationship in these systems and understanding the role of guest cation size/shape mismatch. We show that using guest cations that would be a poor fit for the void-space in commonly adopted topologies can lead to two structural phenomena exemplified in compounds reported here. Firstly, the adoption of unusual topologies, such as 5-connected frameworks e.g.[Bu4N]0.5Cd[Ag(CN)2]2.5 and secondly, correlated structural disorder as seen in molecular perovskite analogues [Bu4N]M'[Au(CN)2]3 where M' = Cd, Mn, Fe.
Follow Acta Cryst. A
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds