2012年1月
Origin of Dark-Channel X-ray Fluorescence from Transition-Metal Ions in Water
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- 巻
- 134
- 号
- 3
- 開始ページ
- 1600
- 終了ページ
- 1605
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ja207931r
- 出版者・発行元
- AMER CHEMICAL SOC
The nonradiative dark channels in the L-edge fluorescence spectra from transition-metal aqueous solution identify the ultrafast charge-transfer processes playing an important role in many biological and chemical systems. Yet, the exact origin of such spectral dips with respect to the X-ray transmission spectrum has remained unclear. In the present study we explore the nature of the underlying decay mechanism of 2p core-excited Co2+ in water by probing the nonradiative Auger-type electron emission channel using photoelectron spectroscopy from a liquid microjet. Our measurements demonstrate unequivocally that metal-to-water charge transfer quenches fluorescence and will inevitably lead to a dip in the total-fluorescence-yield X-ray absorption spectrum. This is directly revealed from the resonant enhancement of valence signal intensity arising from the interference of two identical final states created by a direct and Auger-electron emission, respectively.
- リンク情報
- ID情報
-
- DOI : 10.1021/ja207931r
- ISSN : 0002-7863
- Web of Science ID : WOS:000301084400044