Inorganic Chemistry, Vol.35, No.26, 7466-7467, 1996
Restoration of Catalytic Activity by Replacement of a Coordinated Amide Group - Synthesis and Laser-Induced Luminescence Studies of the Phosphate Diester Transesterification Catalyst (Eu(Nbac))(3+)
The europium(III) complex of the octadentate tetraamide ligand is inactive as a catalyst for phosphate diester transesterification or for RNA cleavage. Replacement of one of the amide coordinating groups to form a new heptadentate ligand yields a europium(III) complex ([Eu(NBAC)](3+)) that is a very active catalyst for phosphate diester transesterification at 37 degrees C, pH 7.40. Laser-induced luminescence is used to study the number of bound water molecules and self-association of the [Eu(NBAC)](3+) complex as well as the dissociation of the complex in the presence of competing ligands. [GRAPHICS]