New structural topologies in 4f-metal cluster chemistry from vertex-sharing butterfly units: {Ln III7} complexes exhibiting slow magnetization relaxation and ligand-centred emissions†
Abstract
The employment of N-salicylidene-o-aminophenol in 4f-metal cluster chemistry has led to a family of {Ln7} clusters with a new core topology that comprises two {Ln4} butterflies sharing a common metal vertex; the {Dy7} derivative exhibits slow magnetization relaxation whereas all heptanuclear compounds show ligand-centred blue-green emissions.