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Two-photon absorption and photoluminescence of europium based emissive probes for bioactive systems

2007; Royal Society of Chemistry; Issue: 48 Linguagem: Inglês

10.1039/b710717j

1477-9234

Lars‐Olof Pålsson, Róbert Pál, Benjamin S. Murray, David Parker, Andrew Beeby,

Molecular Sensors and Ion Detection

Observation of two-photon excitation (760 nm) and emission of two responsive water soluble europium complexes is reported with cross-sections of up to 2 GM. Two-photon excitation spectra have also been measured, acquisition being achieved by the use of a cavity-dumped mode locked Ti-sapphire laser. Time-gated detection is used to differentiate the ligand fluorescence and metal centred emission in these europium complexes.