期刊
CHEMICAL PHYSICS LETTERS
卷 392, 期 1-3, 页码 44-49出版社
ELSEVIER
DOI: 10.1016/j.cplett.2004.05.048
关键词
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The electronic and optical properties of fluorescein-isothiocyanate (FITC) and FITC labeled proteins, Concanavalin A lectin and goat anti-rabbit immunoglobulin G have been investigated by X-ray excited optical luminescence (XEOL) using tunable soft X-rays from a synchrotron light source, together with X-ray absorption find structures (XAFS) spectroscopy at the C, N, and O K-edges. It is found that the carbon-localized excitation at the C K-edge is coupled to the luminescence chromophore effectively and excitations at the nitrogen and oxygen K-edge are not. The implication is that XEOL is excitation channel specific and that it can be used as a powerful tool in studying the optical properties of biomolecules. (C) 2004 Elsevier B.V. All rights reserved.
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