Study on Synthesis Fluorescent Properties and Antibacterial Activity of Rare Complexes of Benzohydroxamic Acids

Study on Synthesis Fluorescent Properties and Antibacterial Activity of Rare Complexes of Benzohydroxamic Acids
　　Rare earth complexes of 4-butoxybenzohydroxamic acid and 4-octyloxybenzohydroxamic acid have been synthesized.These complexes were characterized by IR spectra,UV spectra,thermal analysis and elemental analysis.Element analysis has proved strong magnets that the formula of these complexes(Ⅰ) is asfollow: (C4H9O-(?)-CONHO)3Ln·xH2O (Ln=La,Ce,Sm,Eu,Tb,Er,Tm,Yb,x=4; Ln=Pr,Nd,Gd,Dy, x=3; Ln=Ho,x=1) ; these complexes(Ⅱ): (C8H17O-(?)-CONHO)3Ln·xH2O ( Ln=La,Ce,Sm,Eu,Tb,Tm,Yb,x=4; Ln= Pr,Nd,Gd,Dy, Er x=3; Ln=Ho,x=1) .IR shows the ligand coordinates through two oxygen atoms and the construction of the complexes is five membered chelate ring.TG-DSC indicates that the weight-loss is identical with the theoretical amount. The fluorescent properties of some complexes were measured http://www.chinamagnets.biz/ and investigated.The main fluorescence peak emission of the complexe of TbL3 (Ⅱ)·4H2O appeared at 489、544、584nm; The main fluoresecence peak emission of the complex of EuL3 (Ⅰ)·4H2O appeared at 591、614nm.Tests of antibacterial activity showed two ligands and their complexes all had inhibitory actions against G(+)Staphylococcus and G(-)Escherichia coli.