Diphenol radical cations and semiquinone radicals as direct products of the free electron transfer from catechol, resorcinol and hydroquinone to parent solvent radical cations
作者:Ortwin Brede、Sudhir Kapoor、Tulsi Mukherjee、Ralf Hermann、Sergej Naumov
DOI:10.1039/b205771a
日期:2002.10.3
In the pulse radiolysis of solutions of catechol, resorcinol and hydroquinone in n-butylchloride, dihydroxybenzene radical cations (40%) as well as semiquinone radicals (60%) are observed as direct synchronously formed products of the electron transfer from the solvent parent ions to the solute. This is explained in terms of free electron transfer succeeding in nearly every encounter of the reactants
在邻苯二酚、间苯二酚和对苯二酚在正丁基氯中的溶液的脉冲辐解中,观察到二羟基苯自由基阳离子(40%)和半醌自由基(60%)是电子从溶剂母离子转移到溶质。这可以用几乎每次反应物的自由电子转移成功来解释,在所研究的二羟基苯的情况下,这涉及飞秒分子动力学效应。C-OH 键的旋转导致分子通过瞬态构象循环,也表现出不同的电子分布。从更化学的角度来看,二酚自由基阳离子代表了氧化半醌自由基形成的第一个也是迄今为止未知的中间体。