title: The luminescence response of diamine-liganded europium complexes upon resonant and pre-resonant excitation.
abstract: The luminescence of four europium thenoyltrifluoroacetonate complexes containing diamine ligands is studied in solutions. The compounds are resonantly excited in the ligand absorption band by means of high-power nanosecond UV laser pulses. Additionally, a continuous light source is also used for resonant, as well as pre-resonant excitation of the complexes. The luminescence response characterizes the synthesized europium coordination complexes as emissive compounds suitable for fluorometric applications. Related to the possible usefulness of the diamine-liganded Eu complexes as luminescent labels for sensing and imaging of biological molecules, the luminescence response of these compounds upon UV excitation was probed also in aqueous media.
authors.affiliation: Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Boulevard, BG-1784 Sofia, Bulgaria. georgibh@issp.bas.bg
authors.forename: G B
authors.initials: GB
authors.lastname: Hadjichristov
authors.forename: S S
authors.initials: SS
authors.lastname: Stanimirov
authors.forename: I L
authors.initials: IL
authors.lastname: Stefanov
authors.forename: I K
authors.initials: IK
authors.lastname: Petkov
mesh_terms: D003959:Diamines / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D008024:Ligands; D008163:Luminescent Measurements / Q000379:methods*
chemical_list: D003959:Diamines; D008024:Ligands; D005063:Europium