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.
