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Novel Lanthanide (III) Complexes Derived from an Imidazole-Biphenyl-Carboxylate Ligand: Synthesis, Structure and
Monica-Cornelia Sardaru1, Narcisa Laura Marangoci1, Sergiu Shova2
1Centre of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Gr. Ghica Voda Alley, 700487 Iasi, Romania.
Abstract:
A series of neutral mononuclear lanthanide complexes [Ln(HL) (Ln = La, Ce, Nd, Eu, Gd, Dy, Ho) with rigid bidentate ligand, HL (4'-(1H-imidazol-1-yl)biphenyl-4-carboxylic acid) were synthesized under solvothermal conditions. The coordination compounds have been characterized by infrared spectroscopy, thermogravimetry, powder X-ray diffraction and elemental analysis. According to X-ray diffraction, all the complexes are a series of isostructural compounds crystallized in the P2/n monoclinic space group. Additionally, solid-state luminescence measurements of all complexes show that [Eu(HL) complex displays the characteristic emission peaks of Eu(III) ion at 593, 597, 615, and 651 nm.
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