title: The luminescence response of Eu(III)-thenoyltrifluoroacetonate complexes upon preresonant excitation with femtosecond laser pulses.
abstract: The luminescence of thenoyltrifluoroacetonate (TTA) coordination complexes of trivalent europium ion (Eu(III)) in aqueous solutions and in solid-state polymeric films is probed upon single- and two-photon preresonant excitation with Ti:sapphire femtosecond laser. Particularly, diamine-liganded Eu(III)(TTA)(3) and poly(oxyethylene phosphate)tris(beta-diketonate)Eu(III) complexes are examined aiming their possible applications as luminescent labels for sensing and imaging of biological molecules. Even at a pre-resonance, the excitation of these compounds with high-intensity, broadband light of frequency-doubled Ti:sapphire femtosecond laser centered around 400 nm results in a luminescence response suitable for fluorometric applications.
authors: Laboratory of Optics and Spectroscopy, Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria. georgibh@issp.bas.bg
authors: Georgi B
authors: GB
authors: Hadjichristov
authors: Ivan L
authors: IL
authors: Stefanov
authors: Stanislav S
authors: SS
authors: Stanimirov
authors: Ivan K
authors: IK
authors: Petkov
mesh_terms: D002614:Chelating Agents / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D007834:Lasers; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods; D013050:Spectrometry, Fluorescence; D013804:Thenoyltrifluoroacetone / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D056831:Coordination Complexes; D013804:Thenoyltrifluoroacetone; D005063:Europium