Elsevier, Inorganic Chemistry Communications, 6(9), p. 634-637
DOI: 10.1016/j.inoche.2006.03.008
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A new luminescent europium derivative [H5O2][Eu(QCy)4] (1) (HQCy = 1-phenyl-3-methyl-4-cyclohexanecarbonylpyrazole-5-one), achievable in high yield, characterized by high thermal stability, ionic in acetone and ethanol solution, contains the Zundel cations H5O2+ stabilized by strong hydrogen bonding with the N atoms of the anionic heterocyclic ligand (QCy).