期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 5, 期 11, 页码 1845-1849出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz500437c
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- Deutsche Forschungsgemeinschaft
The terahertz (THz) absorption bands of biomolecular hydration layers are generally swamped by absorption from bulk water. Using the disaccharide trehalose, we show that this limitation can be overcome by attaching a molecular probe. By time-resolving the fluorescence shift of the probe, a local THz spectrum is obtained. From the dependence on temperature and H2O/D2O exchange, it is concluded that the trehalose hydration layer is being observed. The region of dynamic water perturbation by the disaccharide encompasses the probe and is therefore larger than the first two solvation layers.
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