Abstract
Abstract A new series of lanthanide(III) complexes with two novel Schiff-base macrocycles, L1 and L2, containing a N3O4 donor set have been prepared by cyclocondensation of 2,6-bis(2-formylphen-oxymethyl)pyridine and l,2-bis(2-aminophenoxy)ethane or 1,3-bis(2-aminophenoxy)propane, respectively, in the presence of the appropriate metal salt as a template agent. In the absence of the metal salt the macrocycles are not formed. The diamine macrocycles L3 and L4 are also formed by reaction of the corresponding diamine and dicarbonyl precursors followed by an in situ reduction with NaBH4. Their complexation potential towards Ln(III) ions were also investigated.
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