1095161-01-5Relevant academic research and scientific papers
Energy transfer from rhenium(i) complexes to covalently attached anthracenes and phenanthrenes
Walther, Mathieu E.,Wenger, Oliver S.
experimental part, p. 6311 - 6318 (2009/03/11)
The synthesis and photophysical properties of a series of chromophore-quencher complexes are reported. They are all comprised of a luminescent rhenium(i) tricarbonyl diimine complex that is covalently attached to anthracene or phenanthrene moieties via rigid rod-like p-xylene bridges of variable lengths. Rhenium-to-anthracene energy transfer is strongly exergonic (-ΔG0≈ 0.9 eV) and causes very efficient rhenium MLCT luminescence quenching. By contrast, rhenium-to-phenanthrene energy transfer is only observed when complexes with sufficiently high MLCT energies are used because for these dyads, the driving force for energy transfer is low (-ΔG0≈ 0.1 eV). For a ～15 donor-acceptor distance, the rate constants of the weakly and the strongly exergonic energy transfer processes differ by more than 3 orders of magnitude. The Royal Society of Chemistry 2008.
