激发态在DNA模型系统中低能电子诱导的链断裂中的作用：水环境的影响
Role of excited states in low-energy electron (LEE) induced strand breaks in DNA model systems: influence of aqueous environment.
作者信息
Kumar Anil, Sevilla Michael D
机构信息
Department of Chemistry, Oakland University, Rochester, MI 48309, USA.
出版信息
Chemphyschem. 2009 Jul 13;10(9-10):1426-30. doi: 10.1002/cphc.200900025.
Abstract
Low-energy electrons (LEEs) interact with a DNA model system to create a variety of excited states. In the gas phase, dissociative (sigma*) states are accessible by LEEs with energy <4 eV (see picture) and cause facile strand breaks through a dissociative electron attachment mechanism. However, under solvation these dissociative (sigma*) states are blue-shifted and are less accessible to LEEs.
摘要
低能电子（LEEs）与DNA模型系统相互作用以产生多种激发态。在气相中，能量<4 eV的低能电子可使离解（σ*）态达到（见图），并通过离解电子附着机制导致链的轻易断裂。然而，在溶剂化作用下，这些离解（σ*）态会发生蓝移，低能电子较难达到这些状态。
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