本論文利用吸收光譜儀和螢光光譜儀以及飛秒脈衝式雷射來激 發模型分子，量測模型分子的吸收光譜、螢光光譜、螢光生命期、螢 光量子產率和非線性光學中雙光子吸收的效應，論文總共分為六個章 節， 11 個模型分子， 三個系列作為探討； 三個系列分別以 Thieno[3,4-c]pyrrole-4,6-dione(TPD)、咪唑(imidazole)及噻吩(thiophene) 做為不同的共軛中心來進行討論，歸類出以下結論： [1]以TPD為共軛中心，兩邊掛有推電子官能基對雙光子吸收有較好表 現。 [2]咪唑連接的分子具有較佳的量子產率，但引入芴共軛單元無法做 有效的π電子轉移，導致雙光子吸收表現不如預期。 [3]延長噻吩數目可以有效的降低吸收能隙，提升雙光子吸收的表 現。;The purpose of this study is to utilize absorption spectroscopy, fluorescence spectroscopy, and femtosecond pulsed laser to measure the absorption spectra, fluorescence spectra, fluorescence lifetimes, fluorescence quantum yield and two-photon absorption spectra of three series of model molecules. This thesis is divided into six chapters and organized as follows: Chapter1: Introduction; Chapter2: Molecular Design; Chapter3: Result and Discussion; Chapter4: Synthesis; Chapter5: The spectrum of nmr and mass, and Chapter6: Experimental Section. The experimental results show that: (1) using thieno[3,4-c]pyrrole-4,6-dione as the π-center and electron-donating functional units as the end-groups will lead to better two-photon absorption; (2) all the imidazole-containing model compounds show high fluorescence quantum yields, but the incorporation of fluorene units does not lead to effective charge-transfer upon excitation. Therefore the molecular two-photon absorption performance of such model chromophores are under our expectation; (3) increase the number of thiophene units or extend the conjugated length of fused thiophene unit can effectively reduce band-gap and enhance the molecular two-photon absorption.
