Complexes of lanthanide ions with a Schiff-base macrocyclic ligand derived from 2,6-diformylpyridine

Reaction of 2,6-diformylpyridine with 1,5-bis(2-aminophenoxy)-3-oxapentane in methanol or ethanol in the presence of hydrated Ln(NO3)3 or Ln(ClO4)3(Ln = lanthanide ion) gave complexes of the type [Ln(NO3)3L] or [Ln(ClO4)3L] where L is the corresponding Schiff-base macrocyclic ligand. In the absence of the metal salt the macrocycle L is not formed. The complexes were characterized by elemental analysis, molar conductivity, mass, IR and 1H NMR spectroscopy and thermogravimetric and magnetic measurements.

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