Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 119, Issue 29, Pages 9167-9172Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp509343x
Keywords
-
Categories
Funding
- U.S. National Science Foundation [CHE1306933]
Ask authors/readers for more resources
Tetrahydrofuran (THF) is well-known as a clathrate former as well as a promoter for gas hydrate formation. This work examines interactions between water and tetrahydrofuran via the effect on waters vibrational spectrum. Due to waters large oscillator strength in the hydrogen-bonded region, interactions are diagnosed by isolating small clusters in a transparent medium (carbon tetrachloride in this study). A weak THF/water hydrogen bond is reflected by a 3450 cm(-1) OH-donor vibration (blue shifted from the water/water hydrogen bond) and a 3685 cm(-1) nonbonded OH stretch (blue shifted 22 cm(-1) from the decoupled OH stretch in this medium). Increasing the THF concentration results in another 20 cm(-1) blue shift of the OH-donor stretch. Additional THF does not complex with free water but rather joins with existing THF/water structures to form a cluster enriched in THF. These results complement previous work examining THF vibrations in clathrate hydrates. Together, they generate a picture in which water mediates between THF pairs - mediation that affects vibrational frequencies of both species. In addition to a frequency shift, waters hydrogen-bonded resonance gains oscillator strength due to its mediating configuration.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available