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Room temperature molecular up conversion in solution.

Aline Nonat1, Chi Fai Chan2, Tao Liu1,2

  • 1Laboratoire d'Ingénierie Moléculaire Appliquée à l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, Bât R1N0, 25 rue Becquerel, Strasbourg, 67087, France.

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|June 16, 2016
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Summary
This summary is machine-generated.

Researchers enhanced light upconversion in an erbium complex by adding fluoride anions. This created a supramolecular assembly that significantly boosted the upconversion signal, offering new possibilities for luminescent materials.

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Area of Science:

  • Chemistry
  • Materials Science
  • Photophysics

Background:

  • Upconversion is an Anti-Stokes luminescence process converting low-energy photons to higher energy.
  • Erbium complexes are known for their upconversion properties.

Purpose of the Study:

  • To investigate the effect of fluoride anions on the upconversion luminescence of a macrocyclic erbium complex.
  • To characterize the supramolecular assembly formed and its impact on luminescence.

Main Methods:

  • Synthesis of a macrocyclic erbium complex.
  • Formation of a supramolecular assembly using fluoride anions in D2O solution.
  • Room temperature upconversion luminescence spectroscopy at 980 nm excitation.

Main Results:

  • A supramolecular [(ErL)2F](+) assembly was formed with fluoride bridging two erbium complexes.
  • This assembly exhibited synergistic interactions including Er-F-Er bonds, hydrogen bonds, and aromatic stacking.
  • The upconversion emission at 525, 550, and 650 nm was significantly enhanced upon dimer formation.

Conclusions:

  • Fluoride-induced supramolecular assembly dramatically enhances upconversion luminescence in erbium complexes.
  • The [(ErL)2F](+) dimer formation is key to the amplified upconversion signal.
  • This finding presents a novel strategy for developing efficient upconversion materials.