The luminescence response of diamine-liganded europium complexes upon resonant and pre-resonant excitation

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 69; no. 2; pp. 443 - 448
• Main Authors: Hadjichristov, G.B., Stanimirov, S.S., Stefanov, I.L., Petkov, I.K.
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 01-02-2008
• Subjects: Diamines; Diamines - chemistry; Europium - chemistry; Europium complex; Fluorophotometry; Ligands; Luminescence decay time; Luminescent Measurements - methods; Thenoyltrifluoroacetonates; TTA; TTA; Thenoyltrifluoroacetonates; Diamines; Luminescence decay time; Europium complex; Fluorophotometry
• ISSN: 1386-1425
• DOI: 10.1016/j.saa.2007.04.021

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.