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通过Stille反应合成了3,′4′-乙撑二-氧2,2′∶5,′2″-三噻吩,并以其作为单体,在0~5℃下,以FeCl3为氧化剂,在氯仿溶液中合成了3种聚(3,′4′-乙撑二氧-2,2′∶5,′2″-三噻吩)。并采用紫外-可见光谱(UV-Vis)、傅里叶红外光谱(FT-IR)、凝胶色谱(GPC)、循环伏安(CV)、透射电镜(TEM)和热重分析(TGA)对聚合物进行了表征。同时讨论了乙撑二氧取代基和FeCl3用量对聚合物性质的影响。结果表明:聚合物的紫外最大吸收为466~474 nm,数均分子量为3.4×103~3.6×103,能隙大约为2.05 eV,热分解温度为110℃。
The synthesis of 3 ’, 4’-ethylenedioxy-2,2’, 5 ’, 2’ -trithiophene by Stille reaction was carried out by using FeCl3 as oxidant at 0 ~ 5 ℃, Three kinds of poly (3, ’4’-ethylenedioxy-2,2’-5,’ 2 ’-trithiophene) were synthesized in chloroform solution. (UV), Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), cyclic voltammetry (CV), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) The polymer was characterized. The effects of ethylene dioxygen and FeCl3 dosage on the properties of polymers were also discussed. The results showed that the maximum UV absorption of the polymer was 466 ~ 474 nm, the number average molecular weight was 3.4 × 103 ~ 3.6 × 103, the energy gap was about 2.05 eV and the thermal decomposition temperature was 110 ℃.