Crystallochemiluminescence accompanying the fluorination of europium (III) nitrate by xenon difluoride in acetonitrile solution

Author(s) Masyagutova, G.A.; Ostakhov, S.S.; Mamykin, A.V.; Ovchinnikov, M.Y.; Fakhreeva, A.V.; Khursan, S.L.
Journal Journal of Fluorine Chemistry
Date Published 03/2019
Abstract Crystallochemiluminescence (CCL) has been discovered in the fluorination of Eu(NO3)3•6H2O with xenon difluoride in acetonitrile. It has been found that the following electron-excited particles act as CCL emitters: elemental xenon *Xe (λem = 458 nm), xenon in an intermediate (+1) oxidation state *Xe+ (λem = 416, 484, 542 nm), europium ion *Eu(III) (λem = 610 nm), and singlet oxygen 1O2 (λem = 1270 nm). A mechanism has been suggested for the formation of electron-excited intermediates and products of XeF2 catalytic decomposition on crystalline juvenile surface of EuF3•nH2O during its crystallization in acetonitrile. The heats of the assumed stages have been estimated in CCSD(T)/QZP approximation. It has been shown that the chain of reactions resulting in intermediates of XeF2 decomposition, including excited states, begins with the high-energy reaction of XeF2 with Eu(III) (ΔH / ΔG = 881 / 910 kJ/mol). The reaction in question is a rare example of a multi-emitter process that produces a number of electron-excited products: *Xe, *Xe+, *Eu(III), and singlet oxygen 1O2.
DOI 10.1016/j.jfluchem.2019.03.004
Citation Masyagutova G., Ostakhov S., Mamykin A., Ovchinnikov M., Fakhreeva A., Khursan S. Crystallochemiluminescence accompanying the fluorination of europium (III) nitrate by xenon difluoride in acetonitrile solution. Journal of Fluorine Chemistry. 2019;TBA:TBA.

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