Castro-Fernández Silvia, Cruz Carlos M, Mariz Inês F A, Márquez Irene R, Jiménez Vicente G, Palomino-Ruiz Lucía, Cuerva Juan M, Maçôas Ermelinda, Campaña Araceli G
Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain.
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001, Lisboa, Portugal.
Angew Chem Int Ed Engl. 2020 Apr 27;59(18):7139-7145. doi: 10.1002/anie.202000105. Epub 2020 Apr 1.
A new family of distorted ribbon-shaped nanographenes was designed, synthesized, and their optical and electrochemical properties were evaluated, pointing out an unprecedented correlation between their structural characteristics and the two-photon absorption (TPA) responses and electrochemical band gaps. Three nanographene ribbons have been prepared: a seven-membered-ring-containing nanographene presenting a tropone moiety at the edge, its full-carbon analogue, and a purely hexagonal one. We have found that the TPA cross-sections and the electrochemical band gaps of the seven-membered-ring-containing compounds are higher and lower, respectively, than those of the fully hexagonal polycyclic aromatic hydrocarbon (PAH). Interestingly, the inclusion of additional curvature has a positive effect in terms of non-linear optical properties of those ribbons.
设计并合成了一类新型的扭曲带状纳米石墨烯，并对其光学和电化学性质进行了评估，结果表明它们的结构特征与双光子吸收（TPA）响应及电化学带隙之间存在前所未有的相关性。制备了三种纳米石墨烯带：一种边缘带有卓酮部分的含七元环纳米石墨烯、其全碳类似物以及一种纯六边形纳米石墨烯。我们发现，含七元环化合物的TPA截面和电化学带隙分别高于和低于完全六边形多环芳烃（PAH）。有趣的是，额外曲率的引入对这些带状物的非线性光学性质有积极影响。
