通过共价连接的儿茶酚-醌系统中的光诱导质子耦合电子转移形成双半醌（双自由基）：重新审视了 Aviram 的半醌。
Bis-semiquinone (bi-radical) formation by photoinduced proton coupled electron transfer in covalently linked catechol-quinone systems: Aviram's hemiquinones revisited.
机构信息
Molecular Photonics Group, van't Hoff Institute for Molecular Sciences (HIMS), Faculty of Science, Universiteit van Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
出版信息
Photochem Photobiol Sci. 2012 Jun;11(6):957-61. doi: 10.1039/c2pp05378k. Epub 2012 Jan 23.
PMID:22266919
Abstract
The structure and reactivity of a covalently linked catechol-ortho-benzoquinone (hemiquinone) is studied by UV-Vis and IR absorption spectroscopy. Nanosecond transient absorption spectroscopy of the hemiquinone reveals the formation of bi-radical state consisting of two semiquinone units. It is a long-lived state resulting from proton coupled electron transfer (PCET).
摘要
通过紫外可见吸收光谱和红外吸收光谱研究了共价连接的儿茶酚-邻苯醌（半醌）的结构和反应性。半醌的纳秒瞬态吸收光谱揭示了由两个半醌单元组成的双自由基态的形成。这是一种长寿命的状态，是质子耦合电子转移（PCET）的结果。
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