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Shining light on the antenna chromophore in lanthanide based dyes

DOI: 10.1039/C7DT04788F DOI Help

Authors: Anne Kathrine R. Junker (University of Copenhagen) , Leila R. Hill (University of Oxford) , Amber Thompson (University of Oxford) , Stephen Faulkner (University of Oxford) , Thomas J. Sorensen (University of Copenhagen)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Dalton Transactions

State: Published (Approved)
Published: March 2018
Diamond Proposal Number(s): 13639

Abstract: Lanthanide based dyes and assays exploit the antenna effect, where a sensitiser-chromophore is used as a light harvesting antenna and subsequent excited state energy transfer populates the emitting lanthanide centred excited state. A rudimentary understanding of the design criteria for designing efficient dyes and assays based on the antenna effect is in place. By preparing kinetically inert lanthanide complexes based on the DO3A scaffold, we are able to study the excited state energy transfer from a 7-methoxy-coumarin antenna chromophore to europium(III) and terbium(III) centred excited state. By contrasting the photophysical properties of complexes of metal centres with and without accesible excited states, we are able to separate the contributions from the heavy atom effect, photoinduced electron transfer quenching, excited state energy transfer and molecular conformations. Furthermore, by studying the photophysical properties of the antenna chromophore, we can directly monitor solution structure and are able to conclude that excited state energy transfer from the chromophore sinlget state to the lanthanide centre does occur.

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 15/03/2018 12:06

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