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온도-의존 하이드로퀴논 크러스레이트의 구조적 변화 및 객체분자의 거동에 관한 연구
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | 박정우 | - |
| dc.date.accessioned | 2017-02-22T06:44:34Z | - |
| dc.date.available | 2017-02-22T06:44:34Z | - |
| dc.date.issued | 2014 | - |
| dc.date.submitted | 57042-05-01 | - |
| dc.identifier.uri | http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175512 | ko_KR |
| dc.identifier.uri | http://repository.kmou.ac.kr/handle/2014.oak/9750 | - |
| dc.description.abstract | The CO2-, CH4-, and CO2/CH4-loaded β-form hydroquinone (HQ) clathrates were synthesized by the gas phase reaction between α-form HQ and high pressure gases. Temperature-dependent Raman spectra of guest-free, CO2-loaded, CH4-loaded, and CO2/CH4-loaded β-form HQ clathrates were measured in the temperature range 300−385K at increments of 5 K. The CH4 molecules rapidly escaped from the β-form HQ clathrate in the temperature range 360−380 K, whereas the CO2 molecules were gradually released from the β-form HQ clathrate framework in the wide temperature range 300−380 K. It was also found that both CO2 and CH4 molecules were rapidly released from the CO2/ CH4-loaded β-form HQ clathrate framework in the temperature range 360−380 K. However, all of the guest-free and guest-loaded β-form HQ clathrates were fully converted to the α-form HQ at the same temperature of 385 K. These results demonstrate the strong effect of temperature on both guest−host interactions and the stability of the framework structure. | - |
| dc.description.tableofcontents | 목 차 List of Tables iv List of Figures v Abstract vii 1. 서 론 1.1 연구배경 1 1.1.1 가스하이드레이트 (gas hydrate) 2 1.1.2 하이드로퀴논 (hydroquinone) 8 1.2 연구범위 10 2. 실험장비 및 방법 2.1 하이드로퀴논 합성 11 2.2 반응기 12 2.3 High resolution Powder X-ray diffraction 12 2.3.1 실험원리 12 2.3.2 실험장비 및 방법 12 2.4 Raman spectroscopy 14 2.4.1 실험원리 14 2.4.2 실험장비 및 방법 15 3. 실험결과 및 토의 3.1 X-선 회절 분석 19 3.2 Raman 분광법 분석 21 3.2.1 Raman 분광 측정 결과 21 3.2.2 in-situ Raman 분광 측정 결과 23 4. 결론 33 참고문헌 35 감사의 글 37 List of Tables Table 1 Structural characteristics of gas hydrate 4 Table 2 Chemicophysical properties of hydroquinone 8 Table 3 Experimental condition of Raman spectroscopy 16 List of Figures Fig. 1.1 Photography of gas hydrate 3 Fig. 1.2 Crystalline lattice of gas hydrate, sI. 5 Fig. 1.3 Crystalline lattice of gas hydrate, sII. 6 Fig. 1.4 Crystalline lattice of gas hydrate, sH. 7 Fig. 1.5 Hydrogen-bond of hydroquinone (a) α-hydroquinone (b) β-hydroquinone 9 Fig. 2.1 Synthesize of hydroquinone 11 Fig. 2.2 Smartlab. high resolution powder X-ray diffraction 13 Fig. 2.3 Species of Raman scattering 14 Fig. 2.4 Schematic diagram of Raman scattering 15 Fig. 2.5 Raman spectroscopy 17 Fig. 3.1 Powder X-ray diffraction patterns of hydroquinone compounds : (A) α-form hydroquinone | - |
| dc.description.tableofcontents | (E) CO2/CH4-loaded β-form hydroquinone 21 Fig. 3.3 Temperature-dependent Raman profiles of CH4-loaded β-form hydroquinone clathrate, showing the structural transformation to α-form hydroquinone 23 Fig. 3.4 Raman spectra of hydroquinone clathrates containing CH4 molecules encaged in the hydroquinone clathrate framework in the temperature range 300-385 K. 24 Fig. 3.5 Raman spectra of hydroquinone clathrates containing CO2 molecules encaged in the hydroquinone clathrate framework in the temperature range 300-385 K. 25 Fig. 3.6 Normalized relative intensities of Raman peaks at 1380 and 2903cm-1 as a function of temperature for the CO2-loaded β-form and CH4-loaded β-form hydroquinone clathrates. 26 Fig. 3.7 Raman spectra of CH4-loaded β-form hydroquinone clathrate at temperature in the region of the structural transformation. 28 Fig. 3.8 Raman spectra of CO2-loaded β-form hydroquinone clathrate at temperature in the region of the structural transformation. 29 Fig. 3.9 Raman spectra of guest-free β-form hydroquinone clathrate at temperature in the region of the structural transformation. 30 Fig. 3.10 Normalized relative intensities of Raman peaks at 1380 and 2903 cm-1 as a function of temperature for the CO2/CH4-loaded hydroquinone clathrates. 32 | - |
| dc.description.tableofcontents | (D) CO2-loaded β-form hydroquinone | - |
| dc.description.tableofcontents | (E) CO2/CH4-loaded β-form hydroquinone 19 Fig. 3.2 Raman spectra of hydroquinone compounds : (A) α-form hydroquinone | - |
| dc.description.tableofcontents | (D) CO2-loaded β-form hydroquinone | - |
| dc.description.tableofcontents | (C) CH4-loaded β-form hydroquinone | - |
| dc.description.tableofcontents | (B) guest-free β-form hydroquinone | - |
| dc.language | kor | - |
| dc.publisher | 한국해양대학교 대학원 | - |
| dc.title | 온도-의존 하이드로퀴논 크러스레이트의 구조적 변화 및 객체분자의 거동에 관한 연구 | - |
| dc.title.alternative | Temperature-Dependent Release of Guest Molecules and Structural Transformation of Hydroquinone Clathrates | - |
| dc.type | Thesis | - |
| dc.date.awarded | 2014-02 | - |
| dc.contributor.alternativeName | Park | - |
| dc.contributor.alternativeName | Jeong Woo | - |
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