Characterization of water, ethanol, and 1-butanol films by interaction with C_6F_(14)

摘要

The properties of water, ethanol and 1-butanol at cryogenic temperatures (10-220 K) are discussed by investigating the interaction with the C_6F_(14) molecule. The C_6F_(14) molecules adsorbed on the surface are incorporated in the bulk of the glassy water and alcohol films. The wettability may arise from the formation of improper hydrogen bonding between the OH group and F atom. On the alcohol films, the incorporated C_6F_(14) molecules segregate to the surface at 100 K, since the hydrogen-bonded rings and chains of alcohols are formed due to the glass-liquid transition. The C_6F_(14) molecules incorporated in the bulk of amorphous solid water can survive a viscous liquid phase that appears above 136 K and desorb abruptly at 167 K as a consequence of the liquid-liquid transition.