汪根欉臺灣大學:化學研究所蔡旺璋Tsai, Wang-ChangWang-ChangTsai2007-11-262018-07-102007-11-262018-07-102007http://ntur.lib.ntu.edu.tw//handle/246246/52001本篇論文研究內容主要設計以三芴(terfluorene)為主體,在芴的9號位置銜接上不同的冠醚(crown ether)官能基,希望藉由三芴的高螢光量子效率及高載子移動率,和冠醚對離子的選擇性及高離子傳導特性,而開發出新型的離子感測器TA6及光電材料TB5和T3B5。 在離子測測器方面,我們以phenyl-1-aza-18-crown-6為辨示端而合成出TA6,利用光激發電子轉移(photoinduced electron transfer)而造成螢光的增減,發現其對Fe2+,Pb2+及Hg2+具良好的選擇性,其螢光約增強四十倍。利用Job’s method、Benesi-Hildebrand method及ESI-Mass圖譜,發現其基態結合比例為1:1。 另一方面,我們結合三芴與具離子傳導特性的benzocrown ether,而合成出TB4、TB5、TB6及T3B5,並以TB5及T3B5做成LECs(Light-emitting Electrochemical Cells)元件,發現其EQE(external quantum efficiency)分別為0.25 %及0.56 %,而加入適量的NaPF6使化合物T3B5形成錯合物,可提升元件的效率到0.63 %,並延長元件的壽命達2.2倍。A series of novel materials which contain terfluorene as a backbone and crown ether(s) as pendant substitution(s) have been synthesized in this thesis. The structures of these materials are shown as below: The crown ether is capable of binding to various cations, allowing these new materials to serve as ion-selective chemosensors. The terfluorene derivatives incorporated with aza-18-crown-6 (TA6) have weak fluorescence due to photoinduced electron transfer (PET) process. After treating TA6 with various cations, the PET process was strongly blocked, leading to a distinct change in fluorescence emission (from weak green to strong blue). From titration experiments, TA6 was found to have excellent selectivity to Hg(Ⅱ), Pb(Ⅱ), and Fe(Ⅱ). The fluorescence intensity enhanced 40-folds after treating with these three cations. This study shows that TA6 can be a prototype of sensor for sensing toxic cation such as Hg(Ⅱ) and Pb(Ⅱ) in biosystem and environment. The bifunctional materials which have terfluorene for charge carriers transporting and crown ether for ions transporting can be applied in light-emitting electrochemical devices. The LEC (Light-emitting Electrochemical Cell) devices were fabricated by spin coating of the terfluorene derivatives and electrolytes. The EQE (external quantum efficiency) of TB5 and T3B5 devices can reach up to 0.25 % and 0.56 %, respectively. By adding appropriate amount of NaPF6 to the thin films of T3B5, the device shows higher efficiency (0.63 %) and longer lifetime.目錄 誌 謝 ii 論文摘要 iv 英文摘要 v 目 錄 vi 圖目錄 viii 表目錄 x 分子結構圖 xi 第一章 緒論 1 第二章 離子感測器的合成及性質 7 2-1 離子感測器簡介 7 2-2 陽離子分子感測器之分子設計與合成 12 2-2-1 陽離子分子感測器之分子設計 12 2-2-2 陽離子分子感測器之逆合成 13 2-2-3 陽離子分子感應器之合成 14 2-3陽離子分子感測器之性質 16 2-3-1光物理性質 16 2-3-2 溶劑效應(Solvatochromism) 19 2-3-3電化學性質 20 2-3-4離子選擇性 22 2-3-5結合比例與結合常數 25 2-4結論與展望 36 第三章、新型LEC材料之合成及性質 37 3-1 LECS簡介 37 3-1-1 LECs操作原理 37 3-1-2 LECs的發展 38 3-2 新型LECS材料之分子設計及合成 39 3-2-1 逆合成分析 40 3-2-2 新型LECs材料的合成 42 3-3 新型LECS材料之性質 45 3-3-1 光物理性質 45 3-3-2 電化學性質 47 3-3-3熱化學性質 51 3-4 新型LECS材料之元件性質 57 3-5結論與展望 63 第四章 實驗部分 64 4-1 測試儀器 64 4-2 實驗步驟與數據 65 參考文獻 78 附錄Ⅰ合成化合物的1H NMR及13C NMR光譜 814240216 bytesapplication/pdfen-US三芴感測器冠醚電子轉移寡聚物crown etherterfluorenePETLEColigomer以三芴為放光主體離子感測器之合成與應用Synthesis and Application of Ion Sensor based on Terfluorene Chromophorethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/52001/1/ntu-96-R94223051-1.pdf