Spectroscopic observation of critical guest concentration appearing in tert-butyl alcohol clathrate hydrate

The tert-butyl alcohol (TBA) is the most hydrophobic of the simple alcohol and by itself does not form a clathrate hydrate with water. A genuine clathrate hydrate is synthesized by exposing a gaseous guest to solid TBA + H2O powders. Here, we examine three consecutive spectroscopic approaches of (1) the occurrence of a "free" OH stretching band (v(OH)) signal of TBA molecules representing an absence of hydrogen bonding between the host water and guest TBA, (2) a tuning effect for creating fresh cages via the rearrangement of the host-water lattice, and finally (3) the existence of a critical guest concentration (CGC) that appears only when the TBA concentration is dilute. The present findings from this simple three-step approach can be extended to other alcoholic guest species with the specific modifications to provide the new insights into inclusion chemistry.
Publisher
AMER CHEMICAL SOC
Issue Date
2008-07
Language
ENG
Keywords

LIGHT-SCATTERING; BINARY-MIXTURES; WATER MIXTURES; BUTANOL; TEMPERATURE

Citation

JOURNAL OF PHYSICAL CHEMISTRY B, v.112, no.29, pp.8443 - 8446

ISSN
1520-6106
DOI
10.1021/jp804447r
URI
http://hdl.handle.net/10203/8879
Appears in Collection
CBE-Journal Papers(저널논문)
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