One‐Step Synthesis of a 2,2’‐Directly‐Linked Perylene Dimer from a 2,5,8,11‐Tetraborylated Perylene

Abstract One‐step Suzuki‐Miyaura cross‐coupling reaction of 2,5,8,11‐tetra‐borylated perylene with 2,6‐bis(trifluoromethyl)bromo‐benzene gave 2,2’‐linked perylene dimer for the first time in 7.3 % yield under the standard conditions. The single‐crystal X‐ray structure exhibits three independent dimers in the unit cell, reflecting the low rotational energy around 2,2’‐linkage. Excited state properties of 2,2’‐dimer were compared with the corresponding 3,3’‐linked congener. The facile synthetic method developed in this study could be a general route to access polycyclic aromatic hydrocarbon oligomers linked at less reactive positions.