Electronic Structure of Genomic DNA: A Photoemission and X-ray Absorption Study
详细信息 查看全文
- 作者：Kurt Kummer ; Denis V. Vyalikh ; Gianina Gavrila ; Alexei B. Preobrajenski ; Alfred Kick ; Martin Bnsch ; Michael Mertig ; Serguei L. Molodtsov
- 刊名：Journal of Physical Chemistry B
- 出版年：2010
- 出版时间：July 29, 2010
- 年：2010
- 卷：114
- 期：29
- 页码：9645-9652
- 全文大小：321K
- 年卷期：v.114,no.29(July 29, 2010)
- ISSN：1520-5207
文摘
The electronic structure of genomic DNA has been comprehensively characterized by synchrotron-based X-ray absorption and X-ray photoelectron spectroscopy. Both unoccupied and occupied states close to the Fermi level have been unveiled and attributed to particular sites within the DNA structure. A semiconductor-like electronic structure with a band gap of 2.6 eV has been found at which the π and π* orbitals of the nucleobase stack make major contributions to the highest occupied and lowest unoccupied molecular orbitals, respectively, in agreement with previous theoretical predictions.