Abstract
Triboluminescence of imidazolium tetrakis(dibenzoylmethanato)europate (1) was observed. Its crystal structure and the triboluminescent spectrum were determined. The crystal is centrosym-metric and the triboluminscent maximum is similar to that of its photoluminescence. Complex 1 is easily deformable and has weakly bonded interactions between ions and molecules in its lattice; these properties may be responsible for the triboluminescent activity. Complex 1 crystallizes in the orthorhombic space group Pbcn with cell parameters a = 9.844(2), b = 25.701(2), c = 21.171 (4)Å; V − 5356(2)Å3 and Z = 4. The structure was refined by full-matrix least squares methods to R = 0.024 and Rw = 0.028.
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