Picosecond Dynamics of Nonadiabatic Proton Transfer: A Kinetic Study of Proton Transfer within the Contact Radical Ion Pair of Substituted Benzophenones/<i>N</i>,<i>N</i>-Dimethylaniline
作者:Kevin S. Peters、Amanda Cashin、Peter Timbers
DOI:10.1021/ja991604+
日期:2000.1.1
the dynamics of proton transfer within substituted benzophenones/N,N-dimethylaniline contact radical ion pairs. The reactions were investigated in the solvents cyclohexane, benzene, and dimethylformamide. The correlation of the reaction rates with the change in free energy reveals that the reaction pathway corresponds to a nonadiabatic process, that is the reaction proceeds by proton tunneling. In nonpolar
皮秒吸收光谱已被用于研究取代二苯甲酮/N,N-二甲基苯胺接触自由基离子对内的质子转移动力学。在溶剂环己烷、苯和二甲基甲酰胺中研究反应。反应速率与自由能变化的相关性表明反应途径对应于非绝热过程,即反应通过质子隧穿进行。在非极性溶剂中,在质子转移过程中观察到“反转区域”。