Kocher, JoëlGumy, FrédéricChauvin, Anne-SophieBünzli, Jean-Claude G.2007-02-152007-02-152007-02-15200710.1039/b614036jhttps://infoscience.epfl.ch/handle/20.500.14299/3110WOS:000244085100010The ionic liquid crystal [C12-mim]Cl has been doped with 5 mol% europium nitrate and the photophysical properties of both the ionic liquid and the trivalent europium ion have been monitored with respect to temperature in the range of 248 to +120 uC. The relative transition probabilities to the various ligand-field sub-levels are sensitive to the phase transitions, but the other photophysical parameters, lifetimes and overall intensities of the transitions to Eu(7F2) and Eu(7F4), display monotonous variation with temperature.text::journal::journal article::research article