Spectroscopic Observation of Critical Guest Concentration Appearing in tert-Butyl Alcohol Clathrate Hydrate

Youngjune Park; Minjun Cha; Woongchul Shin

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Spectroscopic Observation of Critical Guest Concentration Appearing in tert-Butyl Alcohol Clathrate Hydrate

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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.

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《The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical》 |2008年第29期|8443-8446|共4页
作者
Youngjune Park; Minjun Cha; Woongchul Shin;
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Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
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Spectroscopic Observation of Critical Guest Concentration Appearing in tert-Butyl Alcohol Clathrate Hydrate

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