title: Spectroscopic characterization of Eu(III) complexes with new monophosphorus acid derivatives of H(4)dota.
abstract: The luminescence lifetimes of europium(III) complexes with new monophosphorus acid derivatives of H(4)dota were measured by means of time-resolved laser-induced luminescence spectroscopy in H(2)O and D(2)O. The hydration numbers of these complexes were estimated using different empirical equations [Horrocks and Sudnick (1979) J. Am. Chem. Soc. 101 (1979) 334; Choppin and Barthelemy(1989) Inorg. Chem. 28, 3354-3357; Choppin and Bünzli Lanthanide probes in life, chemical and earth sciences. Theory and practice (1989); Kimura and Kato J. Alloys Comp. 275-277 (1998) 806; Parker (1999) J. Chem. Soc., Perkin Trans. 2, 493-503; Supkowski and Horroks (2002) Inorg. Chim. Acta. 340, 44-48]. It was shown that all the relationships gave similar results with a satisfactory precision. The hydration numbers of complexes of H(3)do3a and H(4)dota agreed with the literature values. One water molecule is coordinated in complexes of the new ligands. The results showed that the Choppin formula based on measurements only in H(2)O can be satisfactorily used for estimation of the hydration numbers.
authors.affiliation: Department of Analytical Chemistry, Faculty of Science, Masaryk University, Kotláská 2, 611 37, Brno, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Táborský
authors.forename: Ivona
authors.initials: I
authors.lastname: Svobodová
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Hnatejko
authors.forename: Pemysl
authors.initials: P
authors.lastname: Lubal
authors.forename: Stefan
authors.initials: S
authors.lastname: Lis
authors.forename: Michaela
authors.initials: M
authors.lastname: Försterová
authors.forename: Petr
authors.initials: P
authors.lastname: Hermann
authors.forename: Ivan
authors.initials: I
authors.lastname: Lukes
authors.forename: Josef
authors.initials: J
authors.lastname: Havel