Four rare structurally characterized hetero-pentanuclear [Zn₄Ln] bis(salamo)-type complexes: syntheses, crystal structures and spectroscopic properties

Abstract

Four new hetero-pentanuclear 3d–4f complexes 1–4 were synthesized and characterized. Supramolecular interactions and fluorescence properties of complexes 1–4 were investigated.

A Stable 3d–4f Heterometallic Cluster with Magneto-Optical Activity

“…Many bifunctional ligands with different electron-donating groups, such as −NH 2 , −Py (Py = Pyridyl), −OH, −COOH, −SO 3 , −PO 3 , and so on, are favorable structure-directing agents to integrate 3 d and 4 f metal ions into heterometallic clusters. − The employment of polydentate ligands containing both N and O donors for obtaining 3 d –4 f heterometallic products has attracted increasing attention due to the distinct affinity and/or preference of the 3 d and 4 f metal ions to N/O donors. − 8-Hydroxyquinoline, a naphthalene-like molecule containing both −N and −OH donors at positions 1 and 8, respectively, can serve as a bifunctional chelating ligand to integrate 3 d and 4 f ions to form hybrid structures. − …”