Synthesis, Characterization, Optical Property and Bioactivity of the Eu(Ⅲ) Complex withAromatic Carboxylic Triazole

摘要

A novel complex {[Eu(H5TIA)(C2O4)0.5(H2O)3]·H2O}n of Eu(Ⅲ)with aromatic carboxylic triazole (H7TIA =5-(4H-1,2,4-triazol-4-yl) isophthalic acid,H2C2O4 =oxalic acid) was hydrothermally synthesized and characterized by IR,UV-Vis,emission spectra and optical activity,and its crystal structure was determined.It crystallizes in triclinic system,space group P(1) with a =7.4452(13),b =10.776(2),c =11.286(2)(A),a =110.546(3)°,β =106.604(3)°,γ =99.031(3)°,V=778.4(2) (A)3,Z =2,C11H13EuN3O10,Mr =499.20,Dc =2.130 g·cm-3,μ =4.090 mm-1,F(000) =486.0,GOOF =1.096,the final R=0.0196 and wR =0.0527 for 3081 observed reflections with I ≥ 2σ(I),R =0.0209 and wR =0.0535 for all data with (△/r)max =0.001,(△ρ)max =0.48 and (△ρ)min =-0.46 e·(A)-3.The natural bond orbital (NBO) charges,electrostatic potential (ESP) and frontier orbital of this complex were also analyzed.The results of anti-bacterial activity against Gram positive (S.aureus) and Gram negative (E.coli) bacteria reveal that the studied complex possesses a moderate inhibiting effect,and the inhibition effect on E.coli is better.