Two lanthanide(III)–copper(II) chains based on [Cu2Ln2] clusters exhibiting high stability, magnetocaloric effect and slow magnetic relaxation

Two 3d–4f heterometallic one-dimensional chains with neutral 4,4′-bipyridine ligands as linkers and [Cu2Ln2] clusters (Ln = Gd for 1, Dy for 2) as nodes have been hydrothermally synthesized and structurally characterized. Magnetic studies indicate that complex 1 exhibits a relatively large magnetocaloric effect, with an entropy change −ΔSmmax=24.8 J kg−1 K−1, whilst, complex 2 features slow magnetic relaxation at low temperature.

Graphical abstractTwo 3d–4f one-dimensional chains with 4,4′-bipyridine ligands as linkers and [Cu2Ln2] clusters (Ln = Gd for 1, Dy for 2) as nodes were reported here. Complex 1 features a relatively large magnetocaloric effect, with an entropy change −ΔSmmax=24.8 J kg−1 K−1, whilst, complex 2 shows slow magnetic relaxation at low temperature.Figure optionsDownload full-size imageDownload as PowerPoint slide