The influence of cavity size on the properties of encapsulated rhodium(III) lons: long-lived metal-centred emission in a symmetric expanded cavity rhodium cage system

Abstract

Efficient and rapid metal template reactions of rhodium(III) hexaamine complexes with paraformaldehyde and nitromethane under non-aqueous conditions lead to both optimal and expanded cavity cage complexes with widely differing X-ray structures and electronic properties; the larger cavity homologues feature a strongly enhanced metal-centred phosphorescence in water at 77 K.