An Electric Cyclophane: Cavity Control Based on the Rotation of a Paraphenylene by Redox Switching

摘要

AM_4 and DM_4 can reversibly open and close their cavities in the redox process. A paraphenylenediamine is the simplest and most basic molecular module to fix and release the free rotation in paraphenylene and has a general purpose. Thus, a paraphenylenediamine provides a basic unit for the molecular actuation unit available not only for a specific limited molecular system but also for many kinds of molecular systems. To open and close the cavity is the most direct approach to switch molecular recognition in cyclophane inclusion chemistry. Actually, the complexation with a guest molecule was switched by these conforma-tional switches (Figure 3 and Supporting Information Figure 8). Attempts to further develop the redox-driven molecular machine system containing paraphenylenediamine moieties are now in progress.