Abstract
Chemiluminescence (CL) accompanying the decomposition of dispiro(diadamantane-1,2-dioxetane) (1) in acetonitrile solutions of EuIII, GdIII, TbIII, PrIII, and CeIII perchlorates was studied. In the presence of EuIII, TbIII, and PrIII ions, the chemiluminescence spectra contain the luminescence bands of these ions. In the cases of GdIII and CeIII, the chemiluminescence is caused by deactivation of singlet-excited adamantanone (2). The excitation of the lanthanide ion depends on the existence of suitable energy levels at which intracomplex excitation transfer from the3n,π* of ketone is possible. Chemiluminescence of1 increases in solutions of EuIII and TbIII. The yields of CL and excitation of the lanthanide ions in the decomposition of1 in the1·EuIII and1\TbIII complexes were determined: φEu · =0.013 ± 0.003 and φTb · =0.08±0.02. The fact that the efficiency for the population of the5D4-level of TbIII is higher than that for the5D1 and5D0-levels of EuIII is related to the difference in the energy gap between the triplet level of2 and the excited levels of the lanthanides.
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For Part I, see Ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 730–735, April, 1997.
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Kazakov, V.P., Voloshin, A.I., Ostakhov, S.S. et al. Chemiluminescence and catalysis of decomposition of dispiro(diadamantane-1,2-dioxetane) in solutions of lanthanide perchlorates. Russ Chem Bull 46, 699–704 (1997). https://doi.org/10.1007/BF02495197
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DOI: https://doi.org/10.1007/BF02495197