Tetrahedron Letters p. 1573 - 1576 (1998)
Update date:2022-07-31
Topics:
Galaup, Chantal
Carrie, Marie-Christine
Azema, Joelle
Picard, Claude
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(III) 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 (Φ = 0.36 in D2O solution at 300 K) and cleaves a RNA model phosphate diester in aqueous solution.
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