Y(III)-enhanced Dy(III) and Sm(III)specific electrogenerated luminescence of heterodinuclear 1-Y(III)-Dy(III)-1 and 1-Y(III)-Sm(III)-1 chelates

: Ala-Kleme T, Haapakka K, Latva M

Publisher: ELSEVIER SCIENCE SA

: 1998

Journal of Alloys and Compounds

: JOURNAL OF ALLOYS AND COMPOUNDS

: J ALLOY COMPD

: 275

: 911

: 914

: 4

: 0925-8388

DOI: https://doi.org/10.1016/S0925-8388(98)00483-6

1 is a heptadentate chelating agent which forms stable dimer-like dinuclear chelates. At a pulse-polarized oxide-covered aluminium cathode in the presence of peroxydisulfate, the homodinuclear 1-Y(III)-Y(III)-1 chelate generates a weak Y(III)-initiated ligand-centered 322 nm ECL, while the homodinuclear 1-Ln(III)'-Ln(III)'-1 and heterodinuclear 1-Y(III)-Ln(III)'-1 chelates (Ln(III)'=Dy(III), sm(III)) initiate intense ligand-sensitized Dy(III)-specific and Sm(III)-specific F-4(9/2) --> H-6(j) and (4)G(5/2) --> H-6(j) transitions, respectively, so that the ECL efficiency of the heterodinuclear chelate is around ten-fold a compared with that of the corresponding homodinuclear chelate. (C) 1998 Elsevier Science S.A.