Combining Defects in a Single Nanographene: A Fully Helical Saddle Ribbon,Synlett

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Combining Defects in a Single Nanographene: A Fully Helical Saddle Ribbon
Synlett ( IF 1.7 ) Pub Date : 2019-02-26 , DOI: 10.1055/s-0037-1611729
Carlos Cruz ₁ , Silvia Castro-Fernández ₁ , Ermelinda Maçôas ₂ , Alba Millán ₁ , Araceli Campaña ₁

Affiliation

The controlled preparation of well-defined distorted nanographenes by a bottom-up approach based on organic synthesis permits the direct establishment of unprecedented structure–property relationships in carbon nanostructures. The simultaneous incorporation of various defects in nanographenes affords highly curved structures with novel or enhanced photophysical properties. In this sense, we recently reported a fully helical and saddle-shaped nanographene ribbon containing the first undecabenzo[7]helicene unit. Both its linear and nonlinear optical properties are enhanced in comparison with those of other partially π-extended [7]helicenes. Moreover, the new superhelicene exhibits the highest emission dissymmetry factor (g lum) reported to date for a homochiral nanographene. The combination of both nonlinear and chiroptical properties in nanographenes opens up new possible future applications for those distorted nanostructures. 1 Introduction 2 Synthesis of Embedded Seven-Membered Rings 3 Combination of Defects: Seven-Membered Rings and π-Extended Helicenes 4 Conclusions and Outlook

中文翻译：

结合单个纳米石墨烯中的缺陷：全螺旋鞍形带

通过基于有机合成的自下而上的方法可控制备明确定义的扭曲纳米石墨烯允许在碳纳米结构中直接建立前所未有的结构-性能关系。在纳米石墨烯中同时掺入各种缺陷提供了具有新的或增强的光物理特性的高度弯曲的结构。从这个意义上说，我们最近报道了一种包含第一个十一苯并[7]螺旋烯单元的完全螺旋状和马鞍形纳米石墨烯带。与其他部分 π 扩展的 [7] 螺旋烯相比，其线性和非线性光学特性都得到了增强。此外，新的超螺旋烯表现出迄今为止报告的同手性纳米石墨烯的最高发射不对称因子（g lum）。纳米石墨烯中非线性和手性光学特性的结合为那些扭曲的纳米结构开辟了新的可能的未来应用。1 引言 2 嵌入七元环的合成 3 缺陷组合：七元环和 π 扩展螺旋 4 结论与展望

更新日期：2019-02-26

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