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Eu(III) complex of a macrocyclic ligand derived from 2,2′-bipyridine and iminodiacetic acid: Synthesis, luminescence and phosphate diester transesterification properties

✍ Scribed by Chantal Galaup; Marie-Christine Carrié; Joëlle Azéma; Claude Picard

Publisher
Elsevier Science
Year
1998
Tongue
French
Weight
281 KB
Volume
39
Category
Article
ISSN
0040-4039

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✦ Synopsis

A very convenient synthesis of a macrocyclic ligand bearing two endocyclic amide and two exocyclic carboxylate groups (lanthanide binding sites) and one sensitizer (2,2'-bipyridine unit) is described. It is shown that the corresponding Eu(IlI) complex bearing a single positive charge and incorporating two water molecules in the first coordination sphere of the metal ion is strongly fluorescent on the basis of energy-transfer luminescence (q~ = 0.36 in D20 solution at 300 K) and cleaves a RNA model phosphate diester in aqueous solution.

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