Yao Xuelin, Zheng Wenhao, Osella Silvio, Qiu Zijie, Fu Shuai, Schollmeyer Dieter, Müller Beate, Beljonne David, Bonn Mischa, Wang Hai I, Müllen Klaus, Narita Akimitsu
Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
Chemical and Biological Systems Simulation Lab, Center of New Technologies, University of Warsaw, 02-097 Warsaw, Poland.
J Am Chem Soc. 2021 Apr 21;143(15):5654-5658. doi: 10.1021/jacs.1c01882. Epub 2021 Apr 7.
As a new family of semiconductors, graphene nanoribbons (GNRs), nanometer-wide strips of graphene, have appeared as promising candidates for next-generation nanoelectronics. Out-of-plane deformation of π-frames in GNRs brings further opportunities for optical and electronic property tuning. Here we demonstrate a novel fjord-edged GNR () with a nonplanar geometry obtained by regioselective cyclodehydrogenation. Triphenanthro-fused teropyrene and pentaphenanthro-fused quateropyrene were synthesized as model compounds, and single-crystal X-ray analysis revealed their helically twisted conformations arising from the [5]helicene substructures. The structures and photophysical properties of were investigated by mass spectrometry and UV-vis, FT-IR, terahertz, and Raman spectroscopic analyses combined with theoretical calculations.
作为一种新型半导体家族，石墨烯纳米带（GNRs），即纳米宽度的石墨烯条带，已成为下一代纳米电子学的有前途的候选材料。GNRs中π框架的面外变形为光学和电子性质调控带来了更多机会。在此，我们展示了一种通过区域选择性环脱氢获得的具有非平面几何形状的新型峡湾边缘GNR（）。合成了三菲并稠合的三聚芘（）和五菲并稠合的四聚芘（）作为模型化合物，单晶X射线分析揭示了它们由[5]螺旋烯亚结构产生的螺旋扭曲构象。通过质谱以及紫外-可见、傅里叶变换红外、太赫兹和拉曼光谱分析并结合理论计算，对（）的结构和光物理性质进行了研究。
