- Author
- Year
- 2008
- Title
- Vibrational dynamics of ice in reverse micelles
- Journal
- Journal of Chemical Physics
- Volume | Issue number
- 128 | 4
- Pages (from-to)
- 044509
- Number of pages
- 7
- Document type
- Article
- Faculty
- Faculty of Science (FNWI)
- Institute
- Van 't Hoff Institute for Molecular Sciences (HIMS)
- Abstract
-
he ultrafast vibrational dynamics of HDO:D2O ice at 180 K in anionic reverse micelles is studied by midinfrared femtosecond pump-probe spectroscopy. Solutions containing reverse micelles are cooled to low temperatures by a fast-freezing procedure. The heating dynamics of the micellar solutions is studied to characterize the micellar structure. Small reverse micelles with a water content up to approximately 150 water molecules contain an amorphous form of ice that shows remarkably different vibrational dynamics compared to bulk hexagonal ice. The micellar amorphous ice has a much longer vibrational lifetime than bulk hexagonal ice and micellar liquid water. The vibrational lifetime is observed to increase linearly from 0.7 to 4 ps with the resonance frequency ranging from 3100 to 3500 cm-1. From the pump dependence of the vibrational relaxation the homogeneous linewidth of the amorphous ice is determined (55±5 cm-1)
- URL
- go to publisher's site
- Language
- English
- Persistent Identifier
- https://hdl.handle.net/11245/1.295341
- Downloads
-
295341.pdf(Final published version)
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