Synthesis, Characterization and Bioactivity of Complexes of Rare Earth with Bis Schiff Base from Furoylpyrazolone

Eleven novel complexes of rare earths with bis Schiff base derived from N,N′ bis[1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne] ethylenediimine((HPM α FP) 2en) were synthesized. On the basis of elemental analysis and molar conductance, the general formula of the complexes, [RE(HPM α FP) 2en(NO 3) 2]NO 3(RE=La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Yb, Y) was given. They were characterized by IR, UV visible, 1H NMR, 13 C NMR and fluorescence spectrography. The results show that the bis Schiff base is quadridentate ligand and the rare earth ions exhibit coordination of eight in the complexes. The antibacterial experiments indicate that they have high antibacterial activities against S.aureus, B.subtillis, E.coli, E.carotovora, and C.flaccumfaciens.