Structures of water molecules at solvent/silica interfaces

The adsorption of water at solvent/silica interfaces was studied using IR-visible sum frequency generation (SFG) vibrational spectroscopy. We discovered a water layer between toluene and silica with no detectable free OHs. The water layer without free OHs showed resistance against further adsorption...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 26(2010), 21 vom: 02. Nov., Seite 16397-400
1. Verfasser: Yang, Zheng (VerfasserIn)
Weitere Verfasser: Li, Qifeng, Gray, Murray R, Chou, Keng C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2010
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Solvents Water 059QF0KO0R Toluene 3FPU23BG52 Silicon Dioxide 7631-86-9
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520 |a The adsorption of water at solvent/silica interfaces was studied using IR-visible sum frequency generation (SFG) vibrational spectroscopy. We discovered a water layer between toluene and silica with no detectable free OHs. The water layer without free OHs showed resistance against further adsorption of water molecules. This "water-resistant" water surface was very stable at room temperature and did not become a regular water layer with free OH over a period of 12 h in water-saturated toluene. However, this special structure of water was not observed at heptane/silica interfaces, at which free OHs were observed. The study indicates that interactions between solvents and water molecules can significantly change the interfacial water properties 
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700 1 |a Li, Qifeng  |e verfasserin  |4 aut 
700 1 |a Gray, Murray R  |e verfasserin  |4 aut 
700 1 |a Chou, Keng C  |e verfasserin  |4 aut 
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