Electron attachment to the DNA bases thymine and cytosine

被引：141

作者：

Denifl, S ^{[1
]}

Ptasinska, S ^{[1
]}

Cingel, M ^{[1
]}

Matejcik, S ^{[1
]}

Scheier, P ^{[1
]}

Märk, TD ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Ionenphys, A-6020 Innsbruck, Austria

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 377卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(03)01096-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electron attachment (EA) to the DNA bases thymine (T) and cytosine (C) was studied in the electron energy range from about 0 to 9 eV using a crossed electron/molecule beams technique. As uracil the dominant negative ions formed via EA reactions to T and C are (T - H)(-) (corresponding to T minus H, with a mass to charge ratio of 125) and (C - H)(-) (corresponding to C minus H with a mass to charge ratio of 110). The respective partial EA cross-sections for (T - H)(-) and (C - H)(-) could be determined yielding peak values of sigma (1.05 eV) = 1.2 x 10(19) m(2), sigma (1.54 eV) = 2.3 x 10(-10) m(2), respectively. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：74 / 80

页数：7

共 21 条

[1] Electron attachment energies of the DNA bases [J].

Aflatooni, K ;

Gallup, GA ;

Burrow, PD .

JOURNAL OF PHYSICAL CHEMISTRY A, 1998, 102 (31) :6205-6207

[2]

Boudaïffa B, 2000, SCIENCE, V287, P1658, DOI 10.1126/science.287.5458.1658

[3]

CHRISTOPHOROU LG, 1984, ELECT MOLECULE INTER, V1, pCH3

[4] DISSOCIATIVE ATTACHMENT OF ELECTRONS IN THE CHLOROMETHANES [J].

CHU, SC ;

BURROW, PD .

CHEMICAL PHYSICS LETTERS, 1990, 172 (01) :17-22

[5] The ion extraction efficiency in a crossed beams experiment using a trochoidal electron monochromator [J].

Cicman, P ;

Francis, M ;

Skalny, JD ;

Märk, TD .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2003, 223 (1-3) :271-278

[6] Monte Carlo simulation of fast electron and proton tracks in liquid water - I. Physical and physicochemical aspects [J].

Cobut, V ;

Frongillo, Y ;

Patau, JP ;

Goulet, T ;

Fraser, MJ ;

Jay-Gerin, JP .

RADIATION PHYSICS AND CHEMISTRY, 1998, 51 (03) :229-243

[7] ELUCIDATION OF PRIMARY RADIATION-DAMAGE IN DNA THROUGH APPLICATION OF AB-INITIO MOLECULAR-ORBITAL THEORY [J].

COLSON, AO ;

SEVILLA, MD .

INTERNATIONAL JOURNAL OF RADIATION BIOLOGY, 1995, 67 (06) :627-645

[8] THE EFFECT OF DIMETHYL-SULFOXIDE ON THE INDUCTION OF DNA DOUBLE-STRAND BREAKS IN V79-4 MAMMALIAN-CELLS BY ALPHA-PARTICLES [J].

DELARA, CM ;

JENNER, TJ ;

TOWNSEND, KMS ;

MARSDEN, SJ ;

ONEILL, P .

RADIATION RESEARCH, 1995, 144 (01) :43-49

[9] Electron attachment to isolated nucleic acid bases [J].

Desfrancois, C ;

AbdoulCarime, H ;

Schermann, JP .

JOURNAL OF CHEMICAL PHYSICS, 1996, 104 (19) :7792-7794

[10] Valence and dipole binding of electrons to uracil [J].

Desfrançois, C ;

Periquet, V ;

Bouteiller, Y ;

Schermann, JP .

JOURNAL OF PHYSICAL CHEMISTRY A, 1998, 102 (08) :1274-1278

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