Room temperature molecular up conversion in solution

Aline Nonat, Chi Fai Chan, Tao Liu, Carlos Platas-Iglesias, Zhenyu Liu, Wing Tak Wong, Rick W K WONG*, Ka-Leung WONG, Loïc J. Charbonnière

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

79 Citations (Scopus)


Up conversion is an Anti-Stokes luminescent process by which photons of low energy are piled up to generate light at a higher energy. Here we show that the addition of fluoride anions to a D 2 O solution of a macrocyclic erbium complex leads to the formation of a supramolecular [(ErL) 2 F] + assembly in which fluoride is sandwiched between two complexes, held together by the synergistic interactions of the Er-F-Er bridging bond, four intercomplex hydrogen bonds and two aromatic stacking interactions. Room temperature excitation into the Er absorption bands at 980 nm of a solution of the complex in D 2 O results in the observation of up converted emission at 525, 550 and 650 nm attributed to Er centred transitions via a two-step excitation. The up conversion signal is dramatically increased upon formation of the [(ErL) 2 F] + dimer in the presence of 0.5 equivalents of fluoride anions.

Original languageEnglish
Article number11978
JournalNature Communications
Publication statusPublished - 15 Jun 2016

Scopus Subject Areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)


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