Room temperature molecular up conversion in solution
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Room temperature molecular up conversion in solutionAutor(es)
Fecha
2016-06-15Cita bibliográfica
Nonat, A., Chan, C., Liu, T. et al. Room temperature molecular up conversion in solution. Nat Commun 7, 11978 (2016) doi:10.1038/ncomms11978
Resumen
[Abstract] 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 D2O solution of a macrocyclic erbium complex leads to the formation of a supramolecular [(ErL)2F]+ 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 D2O 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)2F]+ dimer in the presence of 0.5 equivalents of fluoride anions.
Palabras clave
Lanthanides
Erbium
Luminescence
Up conversion
Macrocycles
Erbium
Luminescence
Up conversion
Macrocycles
Versión del editor
Derechos
Atribución 3.0 España
ISSN
2041-1723