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Title: | 五苯荑衍生之分子煞車系統 Pentiptycene-Derived Molecular Brakes |
Authors: | Wei-Ting Sun 孫瑋廷 |
Advisor: | 楊吉水(Jye-Shane Yang) |
Keyword: | 五苯荑,分子煞車,光異構化,光誘導電子轉移,防鎖死煞車, pentiptycene,molecular brake,photoisomerization,photoinduced electron transfer,anti-lock brake system, |
Publication Year : | 2014 |
Degree: | 博士 |
Abstract: | 微小的機械裝置可以增加工作的效率與精確度,利用由下而上的方式研究與設計合成分子機械可以來模擬微觀世界中機械的運作方法與模式。在本篇論文中我們以具有三度空間剛硬結構的五苯荑作為轉輪,與具有光致順反異構化的二苯乙烯做為能量輸入與煞車器,將兩者結合設計與合成一系列光驅動的分子煞車1R與2R。此系列煞車分子可以藉照光反應在反式(E-1R, E-2R)與順式(Z-1R, Z-2R)間轉換,藉由反、順式的立體障礙不同使五苯荑轉輪的轉速改變,反式與順式分別代表著煞車的啟動與關閉。本論文利用改變煞車分子上取代基團來研究煞車器與轉輪間的交互作用,並增加光誘導電子轉移的機制讓分子煞車具有防鎖死煞車系統,延長煞車分子的共軛長度引入絕熱異構化的機制以改善防鎖死煞車系統的運作與增加螢光警示功能。 In this thesis, we report on design and synthesis of a series of light-driven molecular brakes 1R and 2R. The molecular brakes are constructed by the three-dimensional rigid pentiptycene structure and light responsive stilbene scaffold. The switching process between the brake-off and the brake-on states relies on the stilbene E-Z photoisomerization. We have tested different substituents on the styryl moiety and discussed the steric and electronic effects between the rotor and the brake components. By introducing the photoinduced electron transfer (PET) module, we created an anti-lock brake system (ABS). The ABS operation is improved with elongated chromophores due to adiabatic isomerization and fluorescence properties. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/58179 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 化學系 |
Files in This Item:
File | Size | Format | |
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ntu-103-1.pdf Restricted Access | 11.22 MB | Adobe PDF |
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