Bottom-up strategies have allowed the synthesis of “molecular” nanographenes with full control over size, shape and functionality. In recent years, the progress on wet chemical approaches, oxidative cyclodehydrogenation amongst all, has been the foundation to the synthesis of an impressive number of soluble and well-defined molecular nanographenes. The level of control over nanographene syntheses has allowed a fine-tuning of the photophysical and electrochemical properties and, in turn, has a compelling potential in the field of material science. In this regard, understanding and harnessing the competition between electron transfer and energy transfer in nanographenic systems is of utmost importance. However, a comprehensive structure-property relationship remains still an open aspect. In the present review we describe a large variety of hexa-peri-hexabenzocoronene (HBC)-based nanographenes obtained through wet chemical strategies and linked – either covalently or non-covalently – to porphyrins, rylenes, fullerenes, etc. Particular attention was placed on the optical, electrochemical and excited-state properties.

自下而上的策略允许合成“分子”纳米石墨烯，并完全控制尺寸、形状和功能。近年来，湿化学方法（其中包括氧化环化脱氢）的进展已成为合成大量可溶且结构明确的分子纳米石墨烯的基础。对纳米石墨烯合成的控制水平允许对其光物理和电化学特性进行微调，从而在材料科学领域具有引人注目的潜力。在这方面，理解和利用纳米石墨系统中电子转移和能量转移之间的竞争至关重要。然而，全面的结构-属性关系仍然是一个开放的方面。在本评论中，我们描述了各种各样的六通过湿化学策略获得并以共价或非共价方式连接到卟啉、萘嵌苯、富勒烯等的基于邻六苯并晕烯 (HBC) 的纳米石墨烯。特别关注其光学、电化学和激发态特性。