Change search
ReferencesLink to record
Permanent link

Direct link
Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy
KTH, School of Biotechnology (BIO), Theoretical Chemistry.
Show others and affiliations
2010 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, Vol. 181, no 2-3, 197-201 p.Article in journal (Refereed) Published
Abstract [en]

Understanding protein functionality is of fundamental importance in biochemistry. Soft X-ray transitions, where the core-level vacancies are filled by the valence-orbital electrons, give direct information about the chemical bonding. Soft X-ray absorption and emission study of poly(dG) -poly(dC) in aqueous solutions can elucidate the relation between the structure and functionality of proteins. We report the N K-edge soft X-ray absorption (XAS) and resonant soft X-ray emission spectroscopy (XES) to characterize the electronic structure near the Fermi level of DNA duplexes to specify the charge migration mechanism. Since N atoms are included in only bases in DNA duplexes, the XES spectra excited from N Is to unoccupied states purely extract the electronic orbital features of the bases in DNA. The fact that N atoms in different bonding environments form well-defined structure has been determined. The experimental findings provide the evidence for the charge-hopping and/or charge-transfer effects in understanding of electric conduction in DNA duplexes when electrons pass through the pi* states of DNA bases.

Place, publisher, year, edition, pages
2010. Vol. 181, no 2-3, 197-201 p.
Keyword [en]
Soft X-ray absorption and emission spectroscopy, RIXS, Electronic structure, DNA, G-C pair, A-T pair
National Category
Analytical Chemistry
URN: urn:nbn:se:kth:diva-29215DOI: 10.1016/j.elspec.2010.05.014ISI: 000281932100022ScopusID: 2-s2.0-77955850851OAI: diva2:393434
QC 20110131Available from: 2011-01-31 Created: 2011-01-27 Last updated: 2011-01-31Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Kashtanov, StepanLuo, Yi
By organisation
Theoretical Chemistry
In the same journal
Journal of Electron Spectroscopy and Related Phenomena
Analytical Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link