Triboluminescence of lanthanide acetylacetonates |
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| Authors: | R G Bulgakov S P Kuleshov A N Zuzlov R R Vafin |
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| Institution: | (1) Institute of Petrochemistry and Catalysis, Academy of Sciences of the Bashkortostan Republic, 141 prosp. Oktyabrya, 450075 Ufa, Russian Federation;(2) Ufa Research Center, Russian Academy of Sciences, 141 prosp. Oktyabrya, 450075 Ufa, Russian Federation |
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| Abstract: | Triboluminescence of Ln(acac)3·H2O (Ln = Tb, Eu, Pr, Ce, Gd) was found. The UV radiation was detected for the first time as narrow bands caused by the emission of the adsorbed N2* molecules (transitions 3∏u → 3∏g) in the study of triboluminescence of lanthanide compounds. The emission of Ln3+* (ionic triboluminescence) was observed only for Tb3+* (λmax/nm: 490 (5D4-7F6), 545 (5D4-7F5), 580 (5D4-7F4)) and Eu3+* (λ?max/nm: 613, 614 (5D2-7F3)). The generation of N2* occurs due to the energy of electric fields appeared upon the destruction of crystalline samples of Ln(acac)3·H2O. The Tb3+* and Eu3+* ions are formed due to the energy transfer from the triplet level of the ligand (acacT1), which is excited by the light emitted from the N2* molecule. |
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| Keywords: | lanthanide acetylacetonates triboluminescence luminescence of molecular nitrogen |
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