Thin films of the short single DNA strand, GCAT, in which one of the bases has been removed were bombarded with 3 to 15 eV electrons. The yield functions of the H(-), O(-) and OH(-) ions desorbed from these films exhibit a broad peak near 9 eV, which is attributed to dissociative electron attachment to the basic molecules. Whereas removal of any one of the bases considerably decreases N-glycosidic and backbone C-O bond scission, the creation of basic sites does not appreciably modify bond rupture leading to anion electron stimulated desorption. These seemingly contradictory results make it possible to propose a detailed mechanism leading to the transfer of electrons in the range 5-13 eV within DNA.
%0 Journal Article
%1 Ptasinska2007a
%A Ptasińska, Sylwia
%A Sanche, Léon
%D 2007
%J Phys Chem Chem Phys
%K chemistry/radiationeffects;Electrons;MolecularStructure Anions analysis;BetaParticles;DNA
%N 14
%P 1730--1735
%R 10.1039/b616619a
%T Dissociative electron attachment to abasic DNA.
%U http://dx.doi.org/10.1039/b616619a
%V 9
%X Thin films of the short single DNA strand, GCAT, in which one of the bases has been removed were bombarded with 3 to 15 eV electrons. The yield functions of the H(-), O(-) and OH(-) ions desorbed from these films exhibit a broad peak near 9 eV, which is attributed to dissociative electron attachment to the basic molecules. Whereas removal of any one of the bases considerably decreases N-glycosidic and backbone C-O bond scission, the creation of basic sites does not appreciably modify bond rupture leading to anion electron stimulated desorption. These seemingly contradictory results make it possible to propose a detailed mechanism leading to the transfer of electrons in the range 5-13 eV within DNA.
@article{Ptasinska2007a,
abstract = {Thin films of the short single DNA strand, GCAT, in which one of the bases has been removed were bombarded with 3 to 15 eV electrons. The yield functions of the H(-), O(-) and OH(-) ions desorbed from these films exhibit a broad peak near 9 eV, which is attributed to dissociative electron attachment to the basic molecules. Whereas removal of any one of the bases considerably decreases N-glycosidic and backbone C-O bond scission, the creation of basic sites does not appreciably modify bond rupture leading to anion electron stimulated desorption. These seemingly contradictory results make it possible to propose a detailed mechanism leading to the transfer of electrons in the range 5-13 eV within DNA.},
added-at = {2011-07-21T21:36:23.000+0200},
author = {Ptasińska, Sylwia and Sanche, Léon},
biburl = {https://www.bibsonomy.org/bibtex/25df7d9eec2a37e100e3852ff2ef6a526/crc_chus},
doi = {10.1039/b616619a},
institution = {Groupe en Sciences des Radiations, Faculté de Médecine, Université de Sherbrooke, Sherbrooke, QC, Canada J1H 5N4. sylwia.ptasinska@usherbrooke.ca},
interhash = {eeb91202784d6695c3ee35ca51a12deb},
intrahash = {5df7d9eec2a37e100e3852ff2ef6a526},
journal = {Phys Chem Chem Phys},
keywords = {chemistry/radiationeffects;Electrons;MolecularStructure Anions analysis;BetaParticles;DNA},
language = {eng},
medline-pst = {ppublish},
month = Apr,
number = 14,
pages = {1730--1735},
pmid = {17396184},
timestamp = {2011-07-21T21:38:05.000+0200},
title = {Dissociative electron attachment to abasic DNA.},
url = {http://dx.doi.org/10.1039/b616619a},
volume = 9,
year = 2007
}