Nanographenes as electron-deficient cores of donor-acceptor systems

作者：Yu-Min Liu, Hao Hou, Yanzhen Zhou, Xin‐Jing Zhao, Chun Tang, Yuan‐Zhi Tan, Kläus Müllen · 发表于：Nature Communications · 年份：2018 · DOI：10.1038/s41467-018-04321-6 · 被引用次数：51 · 研究领域：Synthesis and Properties of Aromatic Compounds、Covalent Organic Framework Applications、Luminescence and Fluorescent Materials

Conjugation of nanographenes (NGs) with electro-active molecules can establish donor-acceptor π-systems in which the former generally serve as the electron-donating moieties due to their electronic-rich nature. In contrast, here we report a series of reversed donor-acceptor structures are obtained by C-N coupling of electron-deficient perchlorinated NGs with electron-rich anilines. Selective amination at the vertexes of the NGs is unambiguously shown through X-ray crystallography. By varying the donating ability of the anilino groups, the optical and assembly properties of donor-acceptor NGs can be finely modulated. The electron-deficient concave core of the resulting conjugates can host electron-rich guest molecules by intermolecular donor-acceptor interactions and gives rise to charge-transfer supramolecular architectures.