Influence of Ligand Environment Stoichiometry on NIR-Luminescence Efficiency of Sm³⁺, Pr³⁺ and Nd³⁺ Ions Coordination Compounds.

ABSTRACT: Six new complexes of the ligand HQ^cy (-4-(cyclohexanecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) and Ln³⁺ ions with emission in the near-infrared (Nd³⁺) or visible and near-infrared (Sm³⁺, Pr³⁺) spectral regions were synthesized and characterized using various methods, including single crystal X-ray diffraction. The study demonstrated that both tris complexes [LnQ^cy₃(H₂O)(EtOH)] and tetrakis-acids [H₃O][LnQ^cy₄] can be synthesized by varying the synthetic conditions. The photochemical properties of the complexes were investigated experimentally and theoretically using various molecular spectroscopy techniques and Judd-Ofelt theory. The objective was to quant

SUBMITTER: Polikovskiy T 

PROVIDER: S-EPMC10421502 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature