2 - Acetyl Benzimidazole Shrink The Synthesis And Properties Of Rare Earth Complexes Of Alanine Schiff Base

The coordination compounds ,synthesized with rear earth metal and amino acid Schiff-bases, are paid much more attention for their various structures and extensive uses . These compounds have the vital bioactivity and excellent luminescence , the applied foreground of these compounds will be extensive in the field of bioactivity .catalysis and functional material etc..In'this paper ,we use the o-phenylendiaminc, lactic acid and chromic acid as raw materials .according to the methods of literature and obtain the precursor 2-acetylbenzimidazole . Using the precursor and alanine in methanol solution, we prepare the ten rare earth 'complexes of 2-acetylbenzimidazole and Alanine Schiff-base .The new Schiff-base ligand and rare earth nitrate complexes are determined by chemical analysis , IR spectra, Raman spectra and UV spectra , the properties of these complexes are determined by experimental facts. The thermal decomposition of the Nd(III) complex which represented the ten complexes has been investigated by TG-DSC. The thermal decomposition process has been presumed by experimental facts .The three-dimension fluorescene excitation and emission spectra of these new rare earth complexes were determined .The experiment results show these complexes which are formed by 2-acetylbenzimidazole and Alanine Schiff base ligand and rare earth ion can improve enormously ligandal photoluminescence ability .We also compared these different rare earth ion which influence the photoluminescence ability of ligand and discussed their photoluminescence mechanism and their up-conversion fluorescence phenomenon .In this paper ,we select four complexes as this series representation and determine their antibacterial activity of different concentration solution. The results of antibacterial activity were analyzed .