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Propane and propane-water interactions: A study at cryogenic temperatures
Ghosh J., Hariharan A.K., Bhuin R.G., Methikkalam R.R.J.,
Published in Royal Society of Chemistry
PMID: 29292468
Volume: 20
Issue: 3
Pages: 1838 - 1847
The phase transition of solid propane and a propane-water mixture under ultrahigh vacuum has been investigated using reflection absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption mass spectrometry (TPD-MS). Here, the investigation is divided into two sections: The phase transition of pure propane and the interaction of propane with water. RAIR spectra of pure propane reveal an unknown crystalline phase at 50 K (phase I), which gradually converts to a known crystalline phase (phase II) at higher temperature. This conversion is associated with certain kinetics. Co-deposition of water and propane restricts the amorphous to crystalline phase transition, while sequential deposition (H2O@C3H8; propane over predeposited water) does not hinder it. For an alternative sequential deposition (C3H8@H2O; water over predeposited propane), the phase transition is hindered due to diffusional mixing within the given experimental time, which is attributed to the reason behind the restricted phase transition. © the Owner Societies 2018.
About the journal
JournalData powered by TypesetPhysical Chemistry Chemical Physics
PublisherData powered by TypesetRoyal Society of Chemistry
Open AccessNo