一个由南开大学Xiao-Ye Wang带领的合作研究小组在杂原子边缘三角烯合成研究中取得一项新突破。2022年9月20日出版的《德国应用化学》杂志发表了这项成果。

在这项工作中，该研究组合成了一个新的[4]杂三角烯，该三角烯在锯齿状的边缘加入了三个氧-硼-氧(OBO)段。研究人员还用单晶X射线衍射法研究了OBO掺杂的[4]三角烯的平面几何结构。这种三角烯在金属表面的自组装呈现出依赖于基底的纳米结构，导致其在Ag和Cu基底上形成不同的长程有序二维图案，而缺陷可以忽略不计。

研究人员表示，三角烯在有机化学和材料科学中引起了广泛的关注，但它们对氧的不稳定性很大。将杂原子嵌入到三角烯中为各种应用提供了一类新的环境稳定材料。然而，[3]杂三角烯在杂原子掺杂三角烯的化学中占主导地位，而它们的高级同类物很少被探索。

附：英文原文

Title: Heteroatom-Edged [4]Triangulene: Facile Synthesis and Two-Dimensional On-Surface Self-Assemblies

Author: Cheng Chen, Jiayi Lu, Yang Lv, Yuyi Yan, Qiang Sun, Akimitsu Narita, Klaus Mü, Xiao-Ye Wang

Issue&Volume: 2022-09-20

Abstract: Triangulenes have attracted enormous interest in organic chemistry and materials science, but suffer from their high instability towards oxygen. Embedding heteroatoms into triangulenes provides a new class of ambient stable materials for various applications. However, [3]heterotriangulenes have dominated the chemistry of heteroatom-doped triangulenes, while their higher homologues have been rarely explored. In this work, we synthesize a new [4]heterotriangulene with three oxygen–boron–oxygen (OBO) segments incorporated into the zigzag edges. The planar geometry of the OBO-doped [4]triangulene is demonstrated by single-crystal X-ray diffraction. Self-assembly on metal surfaces reveals substrate-dependent nanostructures, leading to different long-range ordered 2D patterns on Ag and Cu substrates with negligible defects.

DOI: 10.1002/anie.202212594

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202212594