| Autor: |
Kelly, Daniel N., Schwartz, Craig P., Uejio, Janel S., Duffin, Andrew M., England, Alice H., Saykally, Richard J. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 9/14/2010, Vol. 133 Issue 10, p101103, 4p, 1 Diagram, 4 Graphs |
| Abstrakt: |
Near edge x-ray absorption fine structure (NEXAFS) spectroscopy at the nitrogen and carbon K-edges was used to study the hydration of adenosine triphosphate in liquid microjets. The total electron yield spectra were recorded as a function of concentration, pH, and the presence of sodium, magnesium, and copper ions (Na+/Mg2+/Cu2+). Significant spectral changes were observed upon protonation of the adenine ring, but not under conditions that promote π-stacking, such as high concentration or presence of Mg2+, indicating that NEXAFS is insensitive to the phenomenon. Intramolecular inner-sphere association of Cu2+ did create observable broadening of the nitrogen spectrum, whereas outer-sphere association with Mg2+ did not. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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