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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65060


    Title: 含咔唑、芴及茚并喹喔啉等雜環單元之共軛染料分子的合成 與其非線性光學性質探討;Synthesis and Nonlinear Optical Properties of Novel Heterocyclic Chromophores Based on Carbazole, Fluorene and Indenoquinoxaline Structures
    Authors: 簡薇;Chien,Wei
    Contributors: 化學學系
    Keywords: 雙光子材料分子設計
    Date: 2014-08-18
    Issue Date: 2014-10-15 14:39:14 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文成功合成出具有茚并喹喔啉(indenoquinoxaline)之模型分子,分為四個系列,探討染料分子的分歧數不同、推拉電子基團不同、共軛長度、推拉電子基之強度不同…等與雙光子吸收效能之關聯性,由線性光學可測得其最大吸收波長,再以此波長測得其螢光放射波長,可藉由結構的不同探討其紅移或藍移可能發生的原因,不同之結構造成的非線性光學也有所不同,實驗上利用飛秒脈衝式雷射來激發模型分子,測得其螢光以實驗證明為雙光子機制所誘發之螢光,經由螢光比較法,使用實驗室合成出之DFL-OXD為標準品,則可得到模型分子之雙光子激發截面積,由測得到的結果與結構,歸類出以下結論:
    [1]延長共軛長度使之波長紅移,雙光子效能之表現提升
    [2]若增加分子結構外圍的分支數目進而擴展成為樹狀型分子,其雙光子吸收效能可大幅度提升
    [3]拉電子基團之1,3,4-oxadiazole與indenoquinoxaline雙光子激發截面的趨勢為indenoquinoxaline可使之提升程度較大
    [4]增加染料分子推拉電子基交錯的情形,可使其有不錯的限幅表現。;Several novel series of multi-branched organic π-structures derived from functionalized carbazole and fluorene and Indenoquinoxaline units have been synthesized and characterized for their linear and nonlinear optical properties. Their linear optical properties were studied by one-photon absorption, one-photon fluorescence, fluorescence quantum yield and life time. The two-photon absorption (2PA) properties were measured by two-photoninduced fluorescence techniques with a mode-locked Ti: sapphire pulsed laser in the range of 680nm-1000nm. The compound 6 exhibits 13123GM on 730 nm. It is also demonstrated that increasing the branch number within a molecule will lead to promoted two-photon absorptivity.
    Appears in Collections:[化學研究所] 博碩士論文

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