Role of excited states in low-energy electron (LEE) induced strand breaks in DNA model systems: influence of aqueous environment.

Role of excited states in low-energy electron (LEE) induced strand breaks in DNA model systems: influence of aqueous environment.
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DOI:
10.1002/cphc.200900025
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发表时间:
2009-07-13
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
Sevilla MD
Sevilla MD
中科院分区:
其他
文献类型:
--
作者:
Kumar A;Sevilla MD

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低能电子(LEE)与DNA模型系统相互作用,产生各种激发态。在气相中,能量<4 eV的LEE可以达到解离(σ*)状态(见图),并通过解离电子附着机制导致链轻易断裂。然而,在溶剂化下,这些解离(σ*)态是蓝移的,并且不太容易接近LEE。
Low‐energy electrons(LEEs) interact with a DNA model system to create a variety of excited states. In the gas phase, dissociative (σ*) 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 (σ*) states are blue‐shifted and are less accessible to LEEs.
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