Syntheses, Structures, Photoluminescence, and Magnetism of a Series of Discrete Lanthanide Complexes based on 2,5‐Dichlorobenzoate and 1,10‐Phenanthroline

The syntheses and crystal structures of eight lanthanide complexes with formula [ Ln (2,5‐DCB) x (phen) y ] are reported, which are characterized via single‐crystal, powder X‐ray diffraction, elemental analysis, IR spectroscopy, thermogravimetric analysis, photoluminescence measurement, and DC/AC magnetic measurement. These eight complexes are isostructural, and possess a discrete dinuclear structure. The adjacent dinuclear molecules are linked by the hydrogen bonding interactions into a one‐dimensional (1D) supramolecular chain. The neighboring 1D chains are further extended into a two‐dimensional (2D) supramolecular layer by the π–π stacking interactions. The photoluminescent properties of complexes 1 (Nd III ), 2 (Sm III ), 3 (Eu III ), 5 (Tb III ), 6 (Dy III ), and 8 (Yb III ) were investigated. Magnetic investigations also reveal the presence of ferromagnetic interactions in complexes 4 (Gd III ), 6 (Dy III ), and 7 (Er III ). Additionally, complex 6 (Dy III ) demonstrates field‐induced slow magnetic relaxation behavior.