[en] The application of applied external pressure to solutions containing lanthanide(III) complexes has been shown to provide useful information concerning the molecular and electronic structure of the species in solution. Eu(III) complexes are of special interest since the usually sharp excitation and emission transitions may be analyzed to determine relative concentrations of the species present. In this paper we describe the types of information concerning equilibria and excited state processes that may be obtained by applying external pressure, and present results for solutions of the Ca-binding protein calmodulin in which Eu(III) ion is used as a replacement for Ca(II). It is shown that differences in the binding site volumes in calmodulin may be determined, and these are in agreement with the known crystal structure

[en] Solvated tris-complexes of (R)- and (S)-1,1'-binaphthyl-2,2'-dyil phosphate with lanthanum(III) and europium(III) centers were prepared and characterized by spectroscopic methods and elemental analysis. Circularly polarized luminescence (CPL) spectra for the optically active isomers of the europium complexes are also reported

[en] Highlights: • Dinuclear lanthanide complexes bridged by 2,3,5,6-tetra(2-pyridyl)pyrazine. • X-ray crystal structure and Hirshfield surfaces. • Solid-state luminescence and DFT calculations. Six dinuclear lanthanide(III) nitrato complexes [Ln(NO₃)₃(H₂O)]₂(μ-tppz) (where tppz = 2,3,5,6-tetra(2-pyridyl) pyrazine and Ln(III) = Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), and Dy (6)) with bis-tridentate N-heterocyclic 2,3,5,6-tetra(2-pyridyl)pyrazine as bridging ligand have been solvothermally synthesized and characterized via elemental analysis, infrared spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction, and powder X-ray diffraction. The 3-D Hirshfeld surface and 2-D fingerprint plots show that the main interactions in 1–6 are the O⋯H/H⋯O intermolecular interactions with relative contributions of about 62%. Although the poor lanthanide(III)-centered luminescence properties clearly point to the efficiency of nonradiative quenching processes (presence of water molecules in the coordination sphere of the lanthanide(III) ions), the ligand tppz is better suited to sensitize the lanthanide(III)'s emissions of Eu^III and Nd^III than Sm^III, Tb^III, and Dy^III. Finally, the magnetic data of Dy^III comple×6 reveals antiferromagnetic coupling between Dy^III ions.