Upconversion in a d–f [RuYb3] Supramolecular Assembly

Richard C. Knighton*, Lohona K. Soro, Waygen Thor, Jean-Marc Strub, Sarah Cianférani, Yves Mély, Marc Lenertz, Ka Leung Wong, Carlos Platas-Iglesias, Frédéric Przybilla, Loïc J. Charbonnière*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We have prepared a hetero-tetrametallic assembly consisting of three ytterbium ions coordinated to a central [Ru(bpm)3]2+ (bpm = 2,2′-bipyrimidine) motif. Irradiation into the absorption band of the peripheral ytterbium ions at 980 nm engenders emission of the 3MLCT state of the central [Ru(bpm)3]2+ core at 636 nm, which represents the first example of f → d molecular upconversion (UC). Time-resolved measurements reveal a slow rise of the UC emission, which was modeled with a mathematical treatment of the observed kinetics according to a cooperative photosensitization mechanism using a virtual Yb centered doubly excited state followed by energy transfer to the Ru centered 1MLCT state.

Original languageEnglish
Pages (from-to)13356–13365
Number of pages10
JournalJournal of the American Chemical Society
Volume144
Issue number29
Early online date30 Jun 2022
DOIs
Publication statusPublished - 27 Jul 2022

Scopus Subject Areas

  • Chemistry(all)
  • Biochemistry
  • Catalysis
  • Colloid and Surface Chemistry

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