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Synthesis and properties of open-cage fullerene C60 derivatives: impact of the extended p-conjugation

机译:出现如下的合成和性质富勒烯C60衍生物:扩展的影响p-conjugation

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摘要

We have developed a method for the synthesis of open-cage fullerene C60 derivatives with extended p-conjugation bearing thienyl groups. By applying this method to an asymmetric diketo derivative, the symmetric form can be obtained without changing the molecular formula. To investigate the structure- property relationship for the asymmetric and symmetric forms, we conducted electrochemical and photophysical measurements. The UV-vis absorption edge was shifted by 210 nm upon changing from the asymmetric to the symmetric form due to the narrower HOMO-LUMO gap, which was also demonstrated by electrochemical analyses. From theoretical calculations, the major contribution of the longest wavelength absorption for the symmetric form is assignable to unusual intramolecular charge transfer transitions whereas p-p* transitions are dominant for the asymmetric form.
机译:我们已经开发出一种合成方法出现如下富勒烯C60衍生物与扩展p-conjugation轴承噻吩基组。这个方法以非对称diketo导数,对称的形式获得改变分子式。结构-性质关系非对称和对称的形式,我们进行的电化学和物理测量。紫外可见吸收边缘被210海里了在改变不对称的对称形式由于HOMO-LUMO差距收窄,这也证明了电化学吗分析。波长最长的主要贡献吸收的对称形式是可转让的不寻常的分子内电荷转移转换而p p *转型是主导不对称的形式。

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