Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy
學年 99
學期 1
出版（發表）日期 2010-08-01
作品名稱 Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy
作品名稱（其他語言）
著者 Guo, J. H.; Kastanov, S.; Soderstrom, J.; Glans, P. A.; West, M.; Learmonth, T.; Chiou, J. W.; Luo, Y.; Nordgren, J.; Smith, K.; Pong, W. F.; Cheng, H.; Griffiss, J. M.
單位 淡江大學物理學系
出版者 Amsterdam: Elsevier BV
著錄名稱、卷期、頁數 Journal of Electron Spectroscopy and Related Phenomena 181(2-3), pp.197–201
摘要 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 1s 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 π* states of DNA bases.
關鍵字 Soft X-ray absorption and emission spectroscopy; RIXS; Electronic structure; DNA; G–C pair; A–T pair
語言 en
ISSN 0368-2048
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度
國別 NLD
公開徵稿
出版型式 紙本
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