Ultrafast Electron Attachment and Hole Transfer Following Ionizing Radiation of Aqueous Uridine Monophosphate.
Ultrafast Electron Attachment and Hole Transfer Following Ionizing Radiation of Aqueous Uridine Monophosphate.
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单磷酸尿苷水溶液电离辐射后的超快电子附着和空穴转移。
DOI:
10.1021/acs.jpclett.8b02170
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发表时间:
2018-09-06
期刊:
影响因子:
--
通讯作者:
Mostafavi M
中科院分区:
文献类型:
--
作者:
Ma J;Denisov SA;Marignier JL;Pernot P;Adhikary A;Seki S;Mostafavi M
The primary localization process of radiation-induced charges (holes (cation radical sites) and excess electrons) remains poorly understood, even at the level of monomeric DNA/RNA-models, in particular, in an aqueous environment. Herein, we report the first spectroscopic study of charge transfer occurring in radiolysis of aqueous uridine 5′-monophosphate (UMP) solutions and its components: uridine, uracil, ribose and phosphate. Our results show that: prehydrated electrons effectively attach to base site of UMP; the holes in UMP formed by either direct-ionization or via reaction of UMP with the radiation-mediated water cation radical (H2O•+) facilely localize on the ribose site, despite the fact that a part of them were initially created either on the phosphate or uracil. The nature of phosphate-to-sugar hole transfer is characterized as a barrierless intramolecular electron transfer with a time constant of 2.5 ns, while the base-to-sugar hole transfer occurs much faster, within 5 ps electron pulse.
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影响因子:
3.3
作者:
Adhikary, Amitava;Becker, David;Palmer, Brian J.;Heizer, Alicia N.;Sevilla, Michael D.
通讯作者:
Sevilla, Michael D.
影响因子:
15
作者:
Adhikary, Amitava;Kumar, Anil;Rayala, Ramanjaneyulu;Hindi, Ragda M.;Adhikary, Ananya;Wnuk, Stanislaw F.;Sevilla, Michael D.
通讯作者:
Sevilla, Michael D.
影响因子:
2.6
作者:
DEEBLE, DJ;VONSONNTAG, C
通讯作者:
VONSONNTAG, C
DOI:
10.1039/c8cp00352a
发表时间:
2018-05-30
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
Ma J ;Marignier JL ;Pernot P ;Houée-Levin C ;Kumar A ;Sevilla MD ;Adhikary A ;Mostafavi M
通讯作者:
Mostafavi M
影响因子:
56.9
作者:
Boudaïffa, B;Cloutier, P;Sanche, L
通讯作者:
Sanche, L