Fluorescence Quenching of Europium(III) by Heteronuclear Complex Formation with Copper(II) or Nickel(II)

Abstract

Abstract Fluorescent spectra of the mononuclear europium(III) complex, Eu(H2 fsaen) (NO3)·5H2O, and the heteronuclear complexes MEu(fsaen) (NO3)·nH2O (n = 4 for M = Cu(II) and n = 6 for M = Ni(II)), were compared, where H4 fsaen is a binucleating ligand, N,N′-bis (3-carboxysalicylidene)ethylenediamine. It was found that the fluorescent bands of Eu(III) observed for the mononuclear complex were significantly quenched on forming binuclear complexes.