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薁是一种青蓝色的具有较大分子偶极矩的化合物.与传统的芳香化合物不同,薁类化合物具有特殊的光电性质.分别以薁的2-位和6-位通过叁键与萘二酰亚胺相连接合成了两个同分异构体化合物1和2.鉴于薁七元环的缺电子性和五元环的富电子性,通过不同的连接位点,两个化合物在物理化学性质以及器件性能方面表现出显著差异.理论计算表明,6-乙炔基薁封端的萘二酰亚胺衍生物2具有更低的最低空轨道(LUMO)能级和更好的LUMO电子离域性.通过旋涂的方法制备了两个化合物1和2的有机场效应晶体管(OFET)器件,在氮气条件下测得1和2的电子迁移率分别为0.022和0.16 cm~2·V~(-1)·s~(-1),基于化合物2的OFET器件表现出更优的场效应性能,这和理论计算所得结果相一致.
薁 is a cyan-blue compound with larger molecular dipole moment.Compared with the traditional aromatic compounds, the 薁 compounds have special optoelectronic properties, respectively, by the 薁 2 and 6-bit through the triple bond and naphthalene Diimide to synthesize two isomers, compounds 1 and 2. In view of the electron-deficient nature of the seven-membered ring and the electron-rich five-membered ring, two compounds are separated by physical Chemical properties, and device performance, the theoretical calculations show that the 6-ethynylsilyl end-capped naphthalimide derivative 2 has a lower lowest LUMO level and a better LUMO electron delocalization The organic field-effect transistor (OFET) devices of two compounds 1 and 2 were prepared by spin-coating method, the electron mobility of 1 and 2 were measured under nitrogen conditions as 0.022 and 0.16 cm ~ 2 · V ~ -1) · s ~ (-1), the OFET device based on compound 2 showed better field-effect performance, which is consistent with the theoretical calculation.