Synthesis, Characterization and Luminescent Properties of Complexes of Rare Earth Nitrates with Tris {2-[N-(pyridine-methanoyl)amino]ethyl} amine
来源期刊：JOURNAL OF RARE EARTHS2003年第4期
论文作者：唐瑜 谭民裕 台夕市 刘伟生
Key words：inorganic chemistry; tripodal ligand; rare earth nitrates; luminescent property; rare earths;
Abstract: A tripodal ligand, tris{2-[N-(pyridine-methanoyl)amino]ethyl}amine(L), and its complexes with rare earth nitrates were synthesized. These new complexes with the general formula of Ln(NO3)3*L*6H2O(where Ln=La, Nd, Eu, Tb, Y) were characterized by elemental analysis, IR spectra, thermal analysis, 1 H NMR spectra, molar conductivity and luminescent spectra. All the complexes are stable in air and their conductances in acetonitrile solution lie in the range of 142～150 S*cm2*mol-1, indicating 1∶1 type electrolytes. The IR and 1H NMR spectra of the ligand and its complexes show that all the C=O groups take part in coordination to the metal ions. The thermal behaviour of Eu complex shows that the weight losses at 75～120 ℃ and 120～210 ℃ correspond to the loss of four lattice water molecules and that of two coordinated water molecules, respectively. The luminescent spectra of the complexes of Eu(Ⅲ) and Tb(Ⅲ) were investigated in methanol.
唐瑜1，谭民裕1，台夕市1，刘伟生1
(1.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China)
Abstract:A tripodal ligand, tris{2-[N-(pyridine-methanoyl)amino]ethyl}amine(L), and its complexes with rare earth nitrates were synthesized. These new complexes with the general formula of Ln(NO3)3*L*6H2O(where Ln=La, Nd, Eu, Tb, Y) were characterized by elemental analysis, IR spectra, thermal analysis, 1 H NMR spectra, molar conductivity and luminescent spectra. All the complexes are stable in air and their conductances in acetonitrile solution lie in the range of 142～150 S*cm2*mol-1, indicating 1∶1 type electrolytes. The IR and 1H NMR spectra of the ligand and its complexes show that all the C=O groups take part in coordination to the metal ions. The thermal behaviour of Eu complex shows that the weight losses at 75～120 ℃ and 120～210 ℃ correspond to the loss of four lattice water molecules and that of two coordinated water molecules, respectively. The luminescent spectra of the complexes of Eu(Ⅲ) and Tb(Ⅲ) were investigated in methanol.
Key words:inorganic chemistry; tripodal ligand; rare earth nitrates; luminescent property; rare earths;
【全文内容正在添加中】
