Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61675
Title: Room temperature molecular up conversion in solution
Authors: Nonat, A
Chan, CF
Liu, T
Platas-Iglesias, C
Liu, Z
Wong, WT 
Wong, WK
Wong, KL
Charbonnière, LJ
Issue Date: 2016
Publisher: Nature Publishing Group
Source: Nature communications, 2016, v. 7, 11978 How to cite?
Journal: Nature communications 
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 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.
URI: http://hdl.handle.net/10397/61675
EISSN: 2041-1723
DOI: 10.1038/ncomms11978
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