本論文合成出一系列二苯甲酮衍生物的typeⅡ型光起始劑，分別在二苯甲酮對位的位置接枝長碳鏈或具有末端雙鍵的基團，目的是希望使光起始劑可以提升固化後材料表面的生物相容性以及與單體彼此產生鍵與鍵的連結，結構的鑑定是透過核磁共振光譜圖(NMR)和質譜儀(MASS)。並利用紫外/可見光光譜儀和螢光光譜儀探討這八種光起始劑在四種不同極性溶劑的光物理性質，得知接長碳鏈的產物因有共振的推電子效應，比較與接末端雙鍵基團的產物，波長有紅移的作用，螢光強度則是因電子會轉移到電荷轉移能階(CT state)有下降的情況。消光係數會與對稱性相關，對稱性越高，消光係數會越大，但與鏈長無絕對的關係。

In this research, a series of typeⅡ photo-initiator of benzophenone derivatives have been synthesized, and the long carbon chains or terminal alkenyl groups are attached at the para position of benzophenone. These photo-initiators are expected to be able to increase the biocompatible of the surface of the cured material or produces the bonds to connect with monomers each other. The identification of structures are measured by nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MASS). Using UV-Vis Spectrophotometer and fluorescence spectrophotometer to discuss photophysical properties in different polar solvents. The result shows that the product with the long carbon chains have redshift and weak fluorescence intensity relative to the product with terminal alkenyl group due to respectively resonance donating effect and the fact that electron can transfer to molecular charge transfer state(CT state). The extinction coefficient is related to the symmetry. The higher the symmetry, the greater the extinction coefficient, but there is no absolute relation to the chain length.

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