Reversible Optical Rotation Change According to the Enantiospecific Photochromic Reaction of [2.2]Metacyclophan-1-ene

Chiral [2.2]metacyclophan-1-ene undergoes an enantiospecific photochromic reaction along with a photoreversible optical rotation change at the wavelength where both photoisomers never absorb. This enables us to carry out a non-destructive read-out of the photomemory made by the photochromic [2.2]metacyclophan-1-ene.