A Molecular Propeller with Three Nanohoop Blades: Synthesis, Characterization, and Solid‐State Packing

Nanoscale carbon‐rich molecular architectures are not only aesthetically appealing but also of practical importance for energy and biomedical technologies. Herein, we report the synthesis of cyclic‐oligophenylene‐based nanopropeller 1 by using an efficient synthon strategy involving sequential intramolecular bisboronate homocoupling and reductive aromatization by H2SnCl4. The nanopropeller molecules pack into a layered hexagonal lattice featuring long‐ranged nano‐sized channels and a total guest‐accessible volume of 48 %, as revealed by X‐ray diffraction studies. We suggest that such a solid‐state arrangement is determined by the interplay between the propeller architecture and the intermolecular van der Waals interactions.