Abstract
X-ray absorption spectroscopy (XAS) and small angle x-ray scattering (SAXS) were utilized to study the effect of fluoride (F−) anion in aqueous solutions. XAS spectra show that F− increases the number of strong H-bonds, likely between F− and water in the first hydration shell. SAXS data show a low-Q scattering intensity increase similar to the effect of a temperature decrease, suggesting an enhanced anomalous scattering behavior in F− solutions. Quantitative analysis revealed that fluoride solutions have larger correlation lengths than chloride solutions with the same cations but shorter compared to pure water. This is interpreted as an increased fraction of tetrahedral low-density structures in the solutions due to the presence of the F− ions, which act as nucleation centers replacing water in the H-bonding network and forming stronger H-bonds, but the presence of the cations restricts the extension of strong H-bonds.
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Dates
Type | When |
---|---|
Created | 14 years, 2 months ago (June 15, 2011, 9:11 a.m.) |
Deposited | 2 years, 2 months ago (June 26, 2023, 1:10 a.m.) |
Indexed | 2 weeks ago (Aug. 20, 2025, 8:40 a.m.) |
Issued | 14 years, 2 months ago (June 14, 2011) |
Published | 14 years, 2 months ago (June 14, 2011) |
Published Online | 14 years, 2 months ago (June 14, 2011) |
Published Print | 14 years, 2 months ago (June 14, 2011) |
Funders
1
National Science Foundation
10.13039/100000001
Region: Americas
gov (National government)
Labels
4
- U.S. National Science Foundation
- NSF
- US NSF
- USA NSF
Awards
1
- CHE-0809324
@article{Waluyo_2011, title={Increased fraction of low-density structures in aqueous solutions of fluoride}, volume={134}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.3597606}, DOI={10.1063/1.3597606}, number={22}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Waluyo, Iradwikanari and Huang, Congcong and Nordlund, Dennis and Weiss, Thomas M. and Pettersson, Lars G. M. and Nilsson, Anders}, year={2011}, month=jun }