Synthesis and characterization of lanthanide(III) complexes with salicylidene-2-aminopyridine.

A series of lanthanide(III) complexes of the type [Ln(SAP)X-2.2H(2)O], wher e Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Dy and Y; X = NO3 or Cl, SAPH = salicyli dene-2-aminopyridine, have been synthesised and characterized by elemental analyses, molar conductance, magnetic measurements, spectral (electronic, i nfrared,H-1 NMR) and thermal studies. The elemental analyses indicate 1:1 ( metal:ligand) stoichiometry for the complexes. The spectral studies show th at the ligand acts as a monobasic tridentate ligand with the phenolic -CO, azomethine nitrogen and ring nitrogen as coordinating sites. The nitrate gr oup is coordinated in a monodentate fashion. The ligand, metal salts and th e complexes were screened for antibacterial and antifungal activities. It w as found that the activity against Candida albicans of the ligand as well a s the metal salts has significantly enhanced on complexation.