Phase shift of quantum oscillations in the recombination luminescence of spin-correlated radical ion pairs
- 作者：Grigoryants ; V.M. ; Tadjikov ; B.M. ; Usov ; O.M. ; Molin ; Yu.N.
- 刊名：Chemical Physics Letters
- 出版年：1995
- 期刊代码：7_00092614
- 类别：ph
- 出版时间：December 1, 1995
- 卷：246
- 期：4-5
- 页码：392-398
- 文件大小：526 K
摘要
The phase shift of quantum oscillations observed in the recombination fluorescence of the (dipennylsulfide-d10)+ / (p-terphenyl-d14)− radical ion pair in isooctane has been detected experimentally. The shift is caused by the delay in (diphenylsulfide-d10)+ formation in the reaction of solvent holes with a diphenylsulfide molecule. Comparison with a theoretical model has given for the rate constant of isooctane hole capture by diphenylsulfide molecules the value (3.5 ± 1) × 1010 M−1 s−1 which exceeds the diffusion-controlled one. The fraction of singlet-correlated pairs in the track has been estimated from the oscillation amplitude to be approximately 35%.