Synthesis and properties of a Pr(III) complex with 2-acetyl-benzimidazoledehyde-glycine Schiff-base ligand

摘要

The 2-acetyl-benzimidazoledehyde-gly-cine Schiff-base ligand and the corresponding Pr(ili) complex Pr_2t_3(NO_3)_3 o 2CH_3OH (L=C_11H_10N_3O_2) were synthesized in methanol and characterized by a series of methods, including chemical analysis, elemental analysis, TOF-MS,~ 1H NMR, UV-, IR-, Raman spectra, thermal analysis, and the three-dimension fluorescence excitation and emission spectra. The Pr(lll) complex exhibits extraordinary water-solubility and the Pr(lll) hydroxide appears at pH > = 13. The complex also possesses specific fluorescent properties. Thus, at the excitation wavelengths 200.0-280.0 and 260-350 nm the fluorescence bands were observed at 290.0 and 400.0 nm, respectively.