Time resolved lanthanide luminescence combined with fluorescence resonance energy transfer (FRET) has been a powerful tool in developing highly sensitive biological assays. The remarkably high quantum yield of new Tb complexes led to their use by Lumiphore in new assays of higher sensitivity (http://www.lumiphore.com/). Now a new class of highly luminescent europium(III) complexes have been developed. This is significant because so many industrial applications are in place using this source. We have shown photoluminescence from the Eu(III) center following energy transfer from the UV absorbing that Dexter electron exchange from the ligand triplet state is the dominant energy transfer mechanism in these photoluminescent systems. The implications for the rational design of more effective photoluminescent lanthanide complexes will be discussed.

Time-resolved lanthanide luminescence: Mechanisms and assay applications

ACS Spring 2022

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