O-naphthol Synthesis, Structure And Fluorescent Properties Of Rare Earth Complexes

All experimental operations were carried out under the conditions of moisture andoxygen-free in nitrogen stream. The solvents used were dewatered and deoxygenatedprior to use.The synthesis and characterization of the complexes [(THF)₂Na]₃[Ln(BINOLate)₃](Ln=Tb (1), Dy (2), Er (3), Lu (4)) and [(THF)₂Na]₃[Ln(R-BINOLate)₃] (Ln=Tb (5),Dy (6), Er (7), Lu (8)) are described. These complexes were synthesized by the reactionof anhydrous LnCl₃ with BINOL and (R)-BINOL in tetrahydrofuran at roomtemperature and were characterized by elemental analysis, IR, UV, TG and X-Ray.Recrystallization of the complexes from THF/hexane led to monocrystals complexes inthe hexagonal space group P6₃. The Ln(Ⅲ) is in a six coordination geometry boundedby oxygen derived from BINOL. The configuration of complexes is in accord with thereported.We studied the fluorescent capability of Binolate lanthanide complexes. Thefluorescent analysis shows that both ligand and complexes exhibit luminescence. Insolid state and solution, they have the different luminescence mechanism, intensity andcolor. So we can synthesize the complexes of dissimilar fluorescence performance bychanging the state and solvent polarity. According to the literatures, the complexes playan important role in luminescence material and probe with the development of theinformation technique.