Bull. Russ. Acad. Sci. Div. Chem. Sci. (Engl. Transl.) p. 828 - 834 (1992)
Update date:2022-08-11
Topics:
Voloshin, A. I.
Sharipov, G. L.
Kazakov, V. P.
Tolstikov, G. A.
Complexation of the chelate both with dioxetane and with adamantanone (2), the product of decomposition of dioxetane, have an important effect on chemiluminescence (CL) in thermal decomposition of adamantylideneadamantane-1,2-dioxetane (1) in the presence of Eu(fod)3 chelate.The stability constants of Eu(fod)3*1 and Eu(fod)3*2 complexes were obtained.It was found that Eu(fod)3 catalyzes and activates chemiluminescent decomposition of 1.The rate constant (k2) of decomposition of the Eu(III)*1 complex was determined from the kinetics of quenching of CL, and the activation parameters were determined from the temperature curve.Luminescence from the 5D1- level of the Eu(III) ion was detected in the CL spectrum and was correlated with direct (bypassing the triplet of the ligand) transfer of excitation energy from 2t* to the luminescent levels of Eu(III) in the geometrically distorted complex Eu(fod)3*2. Keywords: chemiluminescence, adamantylideneadamantane-1,2-dioxetane, Eu(fod)3, catalysis.
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