Photoelectron spectroscopy of isolated multiply negatively charged oligonucleotides

被引：44

作者：

Weber, JM

Ioffe, IN

Berndt, KM

Löffler, D

Friedrich, J

Ehrler, OT

Danell, AS

Parks, JH

Kappes, MM

机构：

[1] Univ Karlsruhe, Inst Phys Chem, D-76128 Karlsruhe, Germany

[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

[3] Harvard Univ, Rowland Inst, Cambridge, MA 02142 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 27期

关键词：

D O I：

10.1021/ja049736c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultraviolet photoelectron spectroscopy in an ion beam was used to investigate the electronic properties of isolated DNA oligonucleotides [dA(5)-4H](4-) and [dT(5)-4H],(4-) carrying four excess negative charges. We find the fourth adiabatic electron affinity to be slightly negative for [dA5-4H],(4-) while it is positive for [dT(5)-4H].(4-) This implies a significant influence of the base composition on energetics, which is in turn relevant for analytic applications and also for charge transport properties.

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页码：8585 / 8589

页数：5

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