主要以瞬態吸收光譜技術搭配單光子計數系統分別偵測激發態吸收及放光的方法，研究以矽烷基作為間隙物共聚物單體sti-si-ani之光引誘電子傳遞反應，由反式雙苯乙烯 (stilbene)和苯胺 (aniline)之間以矽烷基 (SiMe2) 做為橋樑組成，此共聚物單體擁有anti和syn兩種構型。以波長266 nm之飛秒雷射為激發光源，在非極性的溶劑中，瞬態吸收光譜譜線存在三個自然指數衰減，很快速的能量轉移過程τ_1^TA = 1-3 ps，及 苯胺的1ππ*及2ππ*的緩解過程τ_2^TA = 60-100 ps，及苯胺與低振動態的雙苯乙烯的生命期τ_3^TA =1-4 ns，而在低極性極高極性的溶劑中，則發現電子轉移態的出現，在低極性電子轉移態的譜帶，存在四個自然指數衰減及生成成分，分別第一個的電子轉移態anti構型極短的衰減生命期_1^(,TA) = 0.5 ps和生成的上升生命期_2^(r ,TA) = 2-8 ps，及第二個電子轉移態轉成syn構型生成的較長上升生命期_3^(r ,TA)，還有一個最長的電子轉移態的衰減_4^TA = 10 ns，在高極性溶劑中，電子轉移的譜帶，也以四個自然指數擬合，分別第一個電子轉移態anti構型的生成為極短的衰減生命期_1^(,TA)= 0.2-0.6 ps和上升生命期_2^(r ,TA) = 0.8-2 ps，及第二個電子轉移態syn構型為較長的上升生命期_3^(r ,TA) =18-30 ps，還有一個長的anti電子轉移態的衰減_4^TA = 145-270 ps，但在高極性且黏度較大的溶劑中還會再觀察到_5^TA = 400~1500 ps，則為轉成syn構型的電子轉移態的衰減生命期，本論文研究結果顯示sti-si-ani受光激發後在極性環境中除了進行能量轉移反應，亦能進行相當有效率的電荷轉移，很適合應用於光引誘電子傳遞材料。

We used time-correlated single photon counting and Femtosecond Transient Absorption to investigate two photoinduced electron transfer dialkylsilylene-spaced monomer . The aniline is the electron Donor , trans-stilbene is the electron Acceptor and SiMe2 as a spacer.This monomer has two conformer anti and syn. We excited DA with a 266 nm laser beam. In non-polar solvents, The observed lifetimes, arranged from short to long are assigned to, the energy transfer lifetime of trans-stilbene (τ_1^TA) is around 1-3 ps, aniline relaxation lifetime between 1ππ* and 2ππ* (τ_2^TA) is around 60-100 ps and the aniline and trans-stilbene fluorescence lifetime (τ_3^TA) are 1 ns and 4 ns. In slightly polar solvents, we detect the charge transfer state (CT state) absorption. The observed lifetimes, arranged from short to long are assigned to, the energy transfer and the first charge transfer state lifetime (τ_1^TA) is around 0.5 ps and a rise lifetime (_2^(r ,TA)) is around 2-8 ps , the second charge transfer state lifetime of anti to syn (τ_3^TA) and the charge transfer state decay lifetime (τ_4^TA) is 10 ns. In polar solvents, we detect four exponential decay. The observed lifetimes, arranged from short to long are assigned to, the lifetime of energy transfer and the formation of charge transfer state is ultrashort at_1^(,TA)= 0.2-0.6 ps and a rise lifetime _2^(r ,TA) = 0.8-2 ps, the second charge transfer state lifetime of anti to syn (τ_3^TA) is around 18-30 ps and the charge recombination lifetime (τ_4^TA) is around 145-270 ps. In polar and high viscosity solvents,we find syn charge transfer state decay lifetime (_5^(,TA)) around 400~1500 ps. The experimental results imply the efficient charge transfer of this monomer in polar environments. This dialkysilylene-spaced monomer is suitable for using in photoinduced electron transfer materials.

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