Front Cover: Significant Effect of the Flexibility of Bridging Alkyl Chains on the Proximity of Stacked Porphyrin and Phthalocyanine Conjugated with a Fourfold Rotaxane Linkage (Chem. Eur. J. 37/2022)

The flexibility of the bridging alkyl chains is important for proximity in the stacking of porphyrin and phthalocyanine conjugated through a fourfold rotaxane linkage. This picture shows a chochin, a Japanese lantern made with paper and thin strips of bamboo that can be expanded and contracted flexibly. This foldability recalls the induced molecular interaction in the flexible molecular conjugate. More information can be found in the Research Article by K. Tanaka et al. (DOI: 10.1002/chem.202200819).