한국해양대학교

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온도의존 실시간 라만분석을 통한 메탄올 하이드로퀴논의 구조적 변화 및 객체 거동에 관한 연구

Title
온도의존 실시간 라만분석을 통한 메탄올 하이드로퀴논의 구조적 변화 및 객체 거동에 관한 연구
Alternative Title
Structual Transformation and Guest Dynamics of Methanol-loaded Hydroquinone Clathrates Observed by Temperature-dependent In-situ Raman Spectroscopy
Author(s)
남병욱
Publication Year
2012
Publisher
한국해양대학교
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175511
http://repository.kmou.ac.kr/handle/2014.oak/9749
Abstract
Hydroquinone (HQ) clathrate is one of the inclusion compounds formed from two or more molecular species and associated with the enclosure of guest molecules within hydrogen-bonded framework formed by the HQ host molecules. the structure of methanol-loaded HQ clathrate was checked by spectroscopy such as X-ray diffraction and Nuclear Magnetic Resonance. Especially the structural transition from methanol-loaded HQ clathrate to crystalline α-form hydroquinone was observed by in-situ Raman spectroscopy as a function of temperatures. The vibrational Raman bands at 1160 and 1600 cm-1 were used as an indication to determine the structural transition of the HQ clathrate. Temperature-dependent Raman measurements showed that the methanol-loaded HQ clathrate is stable at temperatures below 380 K and gradually transforms to the a-form of crystalline HQ between 380 ~ 410 K. At the transition region, we observed a dramatic decrease of the O-H stretching Raman band of methanol at 3627 cm-1, indicating the rapid release of methanol molecules from the HQ clathrate framework.
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해양에너지자원공학과 > Thesis
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000002175511.pdf Download

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