The flowing afterglow technique was used to determine the electron affinity of chlorine dioxide. A value of 2.37 ± 0.10 eV was found by bracketing between the electron affinities of HS° and SF4 as a lower limit and that of NO2 as an upper limit. This value is in excellent agreement with 2.32 eV predicted from a simple thermodynamic cycle involving the reduction potential of the C102/C102- couple and a Gibbs hydration energy identical with that of SO2-.
Babcock, Lucia M.; Pentecost, Thomas C.; and Koppenol, W. H., "Electron Affinity of Chlorine Dioxide" (1989). Peer Reviewed Articles. 27.