Quenching mechanisms of uranyl luminescence by metal ions

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Abstract

The quenching reaction of uranyl luminescence by metal ions in a lower valence state such as Fe2+, Tl+ and Ce3+ is diffusion-controlled and the dominant process of the reaction is concluded to be an electron transfer from the quenchers to uranyl ion. In case of many transition metal and lanthanide ions including Ce(IV), MnO4 and Cr2O72−, the electron transfer is impossible energetically and the energy transfer is predominant.

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    Present address: Kobe Women's College of Pharmacy, 4-19-1 Motoyamakita-machi, Higashinada-ku, Kobe, Japan.

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