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Polyanionic Polydentate Europium Complexes as Ultrabright One- or Two-photon Bioprobes.

Henri SundYuan-Yuan LiaoChantal AndraudAlain DuperrayAlexei GrichineBoris Le GuennicFrançois RiobéHarri TakaloOlivier Maury
Published in: Chemphyschem : a European journal of chemical physics and physical chemistry (2018)
A family of europium (III) complexes based on a polydentate ligand functionalized by charge-transfer antennae presents remarkable one- and two-photon photophysical proper-ties in water or buffer. A detailed analysis of their emission properties suggests that the wrapping of the ligand around the central rare-earth ion results in an overall Cs symmetry in agreement with the theoretical simulation and that about 65-70 % of the emission intensity is concentrated in the hypersensitive 5 D0 →7 F2 transition at 615 nm. Their brightness is excellent, in the range of the best lanthanide bioprobes making them very attractive for bio-imaging experiments.
Keyphrases
  • living cells
  • high resolution
  • single molecule
  • high intensity
  • quantum dots
  • monte carlo
  • solid state
  • fluorescent probe
  • energy transfer