Abstract
Abstract Six new complexes {[Gd(L1)2(H2O)3]·Cl}n (1), [Eu(HL2)2(H2O)6]·(H2O)4·3Cl (2), [Ln(HL2)2(H2O)6]·3Cl [Ln = Ho (3) and Sm (4)], {[Ln(HL3)2(H2O)2]·2Cl}n [Ln = Eu (5) and Yb (6)] (H2L1 = 2-(hydroxymethyl)-1H-benzo[d]imidazole-5-carboxylic acid, H2L2 = 2-(4-hydroxyphenyl)-1H-benzo[d]imidazole-5-carboxylic acid, H3L3 = 2-(2-carboxyethyl)-1H-benzo[d]imidazole-5-carboxylic acid) have been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). Complexes 1, 5 and 6 are an infinite one-dimensional (1D) chain by hydrogen bonding interactions to give a 3D supermolecular structure. Complexes 2–4 are mononuclear structure, which further formed 3D supermoleculear structure through hydrogen-bonding interactions. Furthermore, luminescent properties of these lanthanide complexes have been assessed in the solid state at ambient temperature. In addition, magnetic measurements reveal that complexes 3–6 have a weak antiferromagnetic interaction, while complex 1 has a ferromagnetic interaction.
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