臺灣博碩士論文加值系統

本論文主要是合成對稱性的低聚共軛分子單體 1,3-雙[(2-氰基-2-alpha-■吩基)
乙烯基]苯, 2,7-雙[(2-氰基-2-alpha-■吩基)乙烯基]聯伸二苯, 1,4-雙[(2-氰基-
2-alpha-■吩基)乙烯基]苯, 1,3-二(alpha-■咯)苯,其中並針對具相同取代基
的單體以循環伏安法氧化聚合.
在合成上以Ullmann反應做為合成聯伸二苯架構(biphenylene)的方式,並控制聯伸二苯
上的取代基位置在2,7-上,使得整個分子的電子共振效應達到最大.同時鑑於以往的研究
顯示,■吩基具有高氧化聚合的能力,因此我們以2-氰基-2-alpha-■吩基乙烯基
(2-cyano-2-alpha-thienylethenyl)做為氧化聚合的活化部位官能基.
在電化學研究上比較三者在聚合能力與速度上的差異.最後並以UV-VIS觀察其聚合前後
吸收波長的改變.

This paper will introduce you the synthesis of conjugated molecules
1,3-bis[(2-cyano-2-alpha-thienyl)ethenyl]benzene, 2,7-bis[(2-cyano-2-
alpha-thienyl)ethenyl]biphenylene,1,4-bis[(2-cyano-2-alpha-thienyl)ethenyl]
benzene and 1,3-di-alpha-pyrrolylbenzene, and the three compounds which
have the same functional group will be treated in chemical oxidation then
polymerize to polymerization.
In synthesis we choose Ullmann reaction to functionize biphenylene,
and control the substituted group in 2,7-position as we can have the most
conjugated effect in the whole molecule.And research, 2-cyano-2-alpha-thienyl
ethenyl group have high oxidative ability, so we choose 2-cyano-2-alpha-
thienyl ethenyl group as our oxidative functional group.
In electrochemical study, we compare these three compounds the ability of
polymerization and the polymerizal speed.Last we observe the UV-VIS absorbance.
We aompare the absorbance wavelength difference from moners and after
polymerization.