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

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:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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