德国马普所的Klaus Müllen和Akimitsu Narita研究团队近日在峡湾边缘的非平面石墨烯纳米带的制备上取得一项新突破。该研究于2021年4月7日发表于国际一流学术期刊《美国化学会志》上。

在该文中，研究人员通过区域选择性环脱氢化反应，制备了一种新的具有峡湾边缘的非平面石墨烯纳米带（FGNR）。研究人员合成了Triphenanthro-fused teropyrene 1和pentaphenanthro-fused quateropyrene 2作为模型化合物，单晶X射线分析表明它们的螺旋扭曲构型是由[5]螺烯亚结构产生的。

利用质谱、紫外-可见光谱、傅里叶变换红外光谱、太赫兹光谱和拉曼光谱结合理论计算，研究人员对FGNR的结构和光物理性质进行了研究。

据悉，作为一种新型半导体，石墨烯纳米带（GNRs），即纳米宽的石墨烯带，已成为下一代纳米电子技术的有希望的候选材料。GNRs中π框架的离面变形为其光学和电子特性的调谐提供了进一步的机会。

附：英文原文

Title: Synthesis of Nonplanar Graphene Nanoribbon with Fjord Edges

Author: Xuelin Yao, Wenhao Zheng, Silvio Osella, Zijie Qiu, Shuai Fu, Dieter Schollmeyer, Beate Müller, David Beljonne, Mischa Bonn, Hai I. Wang, Klaus Müllen, Akimitsu Narita

Issue&Volume: April 7, 2021

Abstract: 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 (FGNR) with a nonplanar geometry obtained by regioselective cyclodehydrogenation. Triphenanthro-fused teropyrene 1 and pentaphenanthro-fused quateropyrene 2 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 FGNR were investigated by mass spectrometry and UV–vis, FT-IR, terahertz, and Raman spectroscopic analyses combined with theoretical calculations.

DOI: 10.1021/jacs.1c01882

Source: https://pubs.acs.org/doi/10.1021/jacs.1c01882