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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 楊吉水(Jye-Shane Yang) | |
| dc.contributor.author | Chia-Huei Chen | en |
| dc.contributor.author | 陳佳惠 | zh_TW |
| dc.date.accessioned | 2021-06-08T00:20:32Z | - |
| dc.date.copyright | 2013-07-30 | |
| dc.date.issued | 2013 | |
| dc.date.submitted | 2013-07-24 | |
| dc.identifier.citation | 1. Balzani, V.; Credi, A.; Venturi, M., Molecular Devices and Machines : Concepts and Perspectives for the Nanoworld. Wiley-VCH: Weinheim, 2008.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17551 | - |
| dc.description.abstract | 本篇論文主要為合成與探討新型分子煞車系統(化合物1)，以五苯荑分子作為轉子；以雙取代之苯環為分子煞車器，轉子與剎車器中引入偶氮基連接來進行順-反異構化，以期應用於光、熱控制之分子機械元件設計。我們利用升溫的二維交換光譜 (2D-EXSY)探討轉子在煞車開啟前、後之轉動速率和動力學參數。當化合物1在順式結構時 (c-1)，轉子與煞車器之間由於立體障礙造成近轉子的單鍵旋轉減慢，煞車開啟 (brake-on)；當化合物1在反式結構時 (t-1)，轉子與煞車器之間因無明顯的立體障礙，讓近轉子的單鍵可自由旋轉，煞車關閉 (brake-off)，讓轉子與煞車器開啟與關閉二狀態間旋轉速率的差異可達109倍。此分子煞車系統之控制，其一是利用光化學使化合物1內的偶氮基進行異構化反應：以t-1為起始物，先用可見光之419 奈米波長，將t-1激發到激發態後進行異構化反應至到達光反應穩定狀態，二者比例約63:37 (c-1: t-1)，接著改以紫外光之254奈米波長，可將部分c-1轉換回t-1至到達光反應穩定狀態，二者比例約為12:88 (c-1: t-1)，因吸收光譜之重疊性，使得分子利用光進行轉換時其轉換效率只能達約51%。其二是藉由偶氮基的特性可進行熱異構化反應，並利用五苯荑上胺基與苯環上硝基的推拉電子組合提高熱異構化速率：在乙腈下先用419 奈米波長光照射得50%的c-1後，在328 K下一小時c-1會殘留約6 %，可得c-1的半生期約20分鐘，故利用加熱提供能量的方式可達成重設分子煞車系統回到較穩定t-1狀態的目的。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2021-06-08T00:20:32Z (GMT). No. of bitstreams: 1 ntu-102-R00223128-1.pdf: 7837981 bytes, checksum: 084ed5d84890c080da5550f698369bed (MD5) Previous issue date: 2013 | en |
| dc.description.tableofcontents | 謝誌 I
中文摘要 II Abstract III 目錄 IV 圖目錄 VII 表目錄 XIII 附圖目錄 XIV 第一章 前言 1 1-1 簡介 1 1-2分子機械 2 1-2-1 生物體內的分子機械 2 1-2-2人造分子機械的特色 3 1-2-3線性運動之人造分子機械 4 1-2-4 旋動之人造分子機械 6 1-2-5 其他運動之人造分子機械 8 1-3光順反異構化作用 9 1-3-1二苯乙烯 (stilbene) 10 1-3-2亞胺(imine) 11 1-3-3 偶氮苯 (azobenzene) 11 1-4 偶氮苯之分子機械 15 1-5 動態NMR (Dynamic NMR) 18 1-5-1譜線形狀分析 (line-shape analysis, LSA) 18 1-5-2交換光譜 (2D-exchange spectrum, 2D-EXSY) 19 1-6苯荑 (iptycene)分子介紹 23 1-6-1苯荑分子的結構與命名 23 1-6-2五苯荑分子 23 1-6-3 五苯荑分子之官能基化 24 1-6-4 五苯荑分子之分子機械 26 1-7 研究動機 30 第二章 結果與討論 31 2-1化合物之合成 31 2-1-1目標化合物之逆合成分析 31 2-1-2目標化合物之合成 31 2-2化合物之結構與性質 34 2-2-1化合物的結構與NMR圖譜 34 2-2-1 化合物 t-1的 X-ray 40 2-2-2化合物 c-1的2D-EXSY光譜性質 42 2-3化合物1的光異構化性質 51 2-3-1化合物1之吸收光譜 51 2-3-2化合物1之光異構化作用 53 2-4化合物1之熱異構化行為 57 2-5 化合物t-1與c-1整體光轉換效率 61 第三章 結論 64 第四章 實驗部分 65 4-1 實驗藥品與溶劑 65 4-2實驗儀器 68 4-3 實驗步驟 71 參考資料 77 附圖 84 | |
| dc.language.iso | zh-TW | |
| dc.title | 以胺基五苯荑-偶氮苯為主體之分子煞車合成與性質研究 | zh_TW |
| dc.title | Synthesis and Characterization of an Azobenzene-Based Molecular Brake Containing a Pentiptycene Rotor | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 101-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林英智(Ying-Chih Lin),邱勝賢(Sheng-Hsien Chiu) | |
| dc.subject.keyword | 偶氮苯,五苯荑,分子煞車,交換光譜,光控制,熱重設, | zh_TW |
| dc.subject.keyword | azobenzene,pentiptycene,molecular brake,EXSY,light control,thermo reset, | en |
| dc.relation.page | 120 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2013-07-24 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 化學研究所 | zh_TW |
| 顯示於系所單位： | 化學系 | |
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