An Anthracene-Based Photochromic Macrocycle as a Key Ring Component To Switch a Frequency of Threading Motion

A concept and demonstration of a switching in frequencies of molecular motions are described using a pseudorotaxane system. The setup consists of dibenzylammonium hexafluorophosphate and a photochromic dianthrylethane‐based [24]crown‐8‐type macrocycle, which we designed as a key ring component for the pseudorotaxane system having photocontrollable threading functionality by changing the size of ring component due to the action of light. Switching device: A switching in frequency of threading motion (see scheme) is described by using a pseudorotaxane system that consists of dibenzylammonium hexafluorophosphate and a [24]crown‐8‐type macrocycle that contains a photochromic dianthrylethane.