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Redox Reactions of Thallium Clusters in Aqueous Solution
Author(s) -
Mulvaney Paul
Publication year - 1993
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199300014
Subject(s) - chemistry , redox , thallium , radiolysis , aqueous solution , redox titration , inorganic chemistry , metal , titration , absorption (acoustics) , half reaction , photochemistry , physics , organic chemistry , acoustics
Abstract The redox chemistry of thallium clusters in aqueous solution has been investigated by pulse radiolysis and γ‐radiolysis. Using Ru(bpy) 3 2+ as a redox indicator, it is shown that the redox potential of the Tl 4 2+/+ couple is more positive than −1.27 V NHE, and that the Tl + /Tl 2 + couple's redox potential is more negative than −1.27 V NHE. Ru(bpy) 3 + reduces Tl 4 2+ with a second‐order rate constant of 6±2 × 10 8 M −1 s −1 . Metallic particles of thallium are predicted to have a surface plasmon absorption band at 205 nm in water. The reduced Tl content in a sol can be measured by air‐free titration with CCl 4 or methylviologen.