title: A time-resolved study of the mechanism of the energy transfer from a ligand to the lanthanide(III) ion in solutions and solid films.
abstract: The photochemical properties of some lanthanide chelates developed for immunohistochemistry have been studied in water and in solid Langmuir-Blodgett films. The fluorescence and triplet-state lifetimes of 4-(phenylethynyl)pyridine (PET), di[(phenylethynyl)pyridine] (D-PET), phenylterpyridine (PTP) and their tetra- or penta-acid derivatives (-TA or -PA) were measured in the presence and absence of Gd(III)-, Tb(III)- and Eu(III)-ions. The mechanism for the total process and the rate constants and quantum yields for the individual reaction steps and for the total process were determined in water solution. Time-resolved absorption and luminescence methods were also used to study the energy transfer between an amphiphilic 4-[4-[(C(10)H(12))(2)NCO]phenylethynyl]-pyridine tetra acid (A-PET-TA) and the Tb(III)- and Eu(III)-ions in solid Langmuir-Blodgett films. Luminescence and transient absorption rate constants were determined.
authors: Institute of Materials Chemistry, Tampere University of Technology, PO Box 541, 33101 Tampere, Finland.
authors: H
authors: H
authors: Lemmetyinen
authors: E
authors: E
authors: Vuorimaa
authors: A
authors: A
authors: Jutila
authors: V M
authors: VM
authors: Mukkala
authors: H
authors: H
authors: Takalo
authors: J
authors: J
authors: Kankare
mesh_terms: D002614:Chelating Agents / Q000737:chemistry; D004735:Energy Transfer; D008024:Ligands; D049449:Luminescence; D008674:Metals, Rare Earth / Q000737:chemistry*; D010777:Photochemistry; D012996:Solutions; D013050:Spectrometry, Fluorescence
chemical_list: D002614:Chelating Agents; D008024:Ligands; D008674:Metals, Rare Earth; D012996:Solutions