自Burroughes 等人以poly(p-phenylenevinylene) (PPV)為材料製作高分子發光二極體以來，以全共軛發光高分子、主鏈含孤立發光基團高分子、側鏈含孤立發光基團高分子或摻混不同的發光高分子常被應用於電激發光（electroluminescence）上並被廣泛研究。
在本篇論文中首先合成了具有電子傳遞基團bis(3-(trifluoromethyl)phenyl)- 1,3,4-oxadiazole (OXD-F), bis(3-(trifluoromethyl)phenyl)-4-(4-hexyloxyphenyl)- 4H-1,2,4-triazole (TAZ-F), 2-(3-(trifluoromethyl)phenyl)-5-(4-(5-(3-(trifluoromethyl) phenyl)-1,3,4-oxadiazol-2-yl)-2,5-bis(hexyloxy)phenyl)-1,3,4-oxadiazole (DIOXD), 2,7-bis(3-(trifluoromethyl)phenyl)-9,9-dihexylfluorene, 4-(4-(hexyloxy)phenyl)-3,5- diphenyl-4H-1,2,4-triazole (TAZ) or 2,5-diphenyl-1,3,4-oxadiazole (OXD)及電洞傳遞基團1,4-bis(hexyloxy)-2,5-distyrylbenzene (DSB), bis(styryl)fluorine (DSF) 3,6-distyryl-N-2-ethylhexylcarbazole, or 2,7-distyryl-9,9-dihexylfluorene的芳香醚電激發光高分子P1~P8。高分子P1~P8的發光中皆有能量轉移的現象。此外高分子P1~P8因有導入電子傳遞基團及電洞傳遞基團，所以對電子與電洞自電極注入的能障能同時降低。
此外本研究合成了PPV的衍生物高分子P9~P18，其中高分子P12和P13 其結構上僅具有電洞傳遞基團的發光高分子，而高分子P10~P11和P13~P18 除具有電洞傳遞基團外，還具有電子傳遞基團OXD、TAZ、DIOXD等。這些不同的電子傳遞基團藉由不同的連接基團與電洞傳遞基團相連接成高分子。這些連接的基團可分為以下四種 (1) 1,4-phenylene（P14和P16）(2) 1,4-divinylbenzene （P15 和P17）(3) 4,4’-biphenylene （P18） (4) ether spacers （P9） (5) single bonds （P10和P11）。 本研究針對這些連接的基團對高分子性質的影響做了光學、電化學及元件上的比較。我們經由 semi-empirical MNDO的方式，將這些高分子的重複單位作分子最穩定的結構模擬與計算，發現在高分子P14、P16、P18中有81~89度畚環間扭角的形成。經由實驗結果發現這些在高分子內介於電子、電洞傳遞基團間的扭角對高分子的光學、電化學、電激發光性質有很大的影響。在光學方面的應用可以透過不同的連接基團的設計來改變高分子發光的顏色，本研究所使用的高分子發光可從藍色、綠色調整到黃色。
本研究所合成的高分子在熱性質、光學性質、電化學性質、元件性質都有做討論與相互的比較，同時利用了模式化合物M1~M5與M1~M4和模式高分子P1~P4和本研究所合成的高分子做性質的比較。此外，對於高分子末端基對性質的影響則另行合成了P12-M~P14-M做討論。

Since polymeric light-emitting diodes based on poly(p-phenylenevinylene) (PPV) were reported by Burroughes et al., electroluminescence (EL) from fully-conjugated polymers, main chain polymers with isolated chromophores, side chain polymers with linked chromophores, and polymeric blends also have been extensively investigated.
In this dissertation, we synthesized a series of copoly(aryl ether)s (P1~P8) consisting of electron-transporting segments [bis(3-(trifluoromethyl)phenyl)-1,3,4-oxadiazole (OXD-F), bis(3-(trifluoromethyl)phenyl)-4-(4-hexyloxyphenyl)-4H-1,2,4-triazole (TAZ-F), 2-(3-(trifluoromethyl)phenyl)-5-(4-(5-(3-(trifluoromethyl)phenyl)-1,3,4-oxadiazol-2-yl)- 2,5-bis(hexyloxy)phenyl)-1,3,4-oxadiazole (DIOXD), 2,7-bis(3-(trifluoromethyl)phenyl)- 9,9-dihexylfluorene, 4-(4-(hexyloxy)phenyl)-3,5-diphenyl-4H-1,2,4-triazole (TAZ) or 2,5-diphenyl-1,3,4-oxadiazole (OXD)] and hole-transporting segments [1,4-bis(hexyloxy)- 2,5-distyrylbenzene (DSB), bis(styryl)fluorine (DSF) 3,6-distyryl-N-2-ethylhexylcarbazole, or 2,7-distyryl-9,9-dihexylfluorene]. The emissions of P1~P8 are dominated by the hole-transporting fluorophores with longer emissive wavelength via efficient excitation energy transfer. From electrochemical date, electron and hole affinity of P1~P8 can be enhanced simultaneously.
Furthermore, a series of PPV derivatives polymer P9~P18 have also synthesized. Polymers P12 and P13 only possess hole-transporting DSB segments are treated as model polymers. Polymer P10~P11 and P13~P18 consisting of electron- transporting OXD, TAZ, DIOXD segments and hole-transporting DSB segments via different connectors. The connectors between hole- and electron-transporting segments in P9~P10 and P14~P18 can be divided into five categories: (1) 1,4-phenylene for P14, and P16; (2) 1,4-divinylbenzene for P15 and P17; (3) 4,4’-biphenylene for P18; (4) ether spacers for P9; (5) single bonds for P10 and P11. The effects of connector structures between hole- and electron-transporting segments on polymeric properties were observed and discussed. From optimized semi-empirical MNDO calculations, the adjacent benzene rings between DSB and OXD, TAZ or DIOXD chromophores in P10, P11, P14, P16, and P18 twist about 81o~89o. The large torsion in P10, P11, P14, P16, and P18 significantly limits delocalization of charges between hole- and electron-transporting segments. Accordingly, in P10, P11, P14, P16, and P18, the oxidation and reduction starts at the hole- and the electron-transporting, respectively, like those in P1~P9. The electroluminescences of P9~P18 and corresponding C.I.E. coordinate are also depicted to indicate that incorporating different connectors to these polymers changed their color from blue, green to yellow region.
The thermal, optical, electrochemical, and electroluminescent properties of these polymers were investigated. Optical properties of P1~P18 were investigated by comparing their absorption and photoluminescence spectra with those of compositional model compounds M1~M5, M1~M4 and model polymers P1~P4. Three corresponding end-capped model polymers P12-M~P14-M were also synthesized to evaluate the effect of end groups.

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