Anomalously High Specific Rates of Diffusion-Controlled Reactions: Luminescence Quenching in Liquid Systems

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Abstract
Quenching constants (γs′) and specific rates of quenching (kq) of uv‐ and high‐energy sensitized luminescence by carbon tetrachloride in de‐aerated solutions of p‐terphenyl in benzene and in cyclohexane are given. Values for kq in benzene ranging as high as 3.6×1010M—1 sec—1 appear, in first approximation, to be quantitatively explicable on the basis of current theoretical treatment. However, the cyclohexane results (kq>3×1011M—1 sec—1) are clearly anomalously high and are not suggested by current theory; some speculation as to the cause of such results is included.