Quenching of Fluorescence in Solution. Effect of the Structure of the Quencher on the Efficiency of the Reaction^1,2

Inorganic Free Radicals in Solution.

“…It is remarkable that this order agrees fairly well with the corresponding electron affinities in solution of the radicals or atoms formed. This is also in good agreement with the recent observations of RowTell and La Her (271) as to the efficiency of organic bases as quenchers. On the other hand, in Class II there is apparently no such simple correlation in the order of the quenching efficiency, which is 107 > Br07 > N07 > S4O72.…”