The twisting behavior involves arbitrary torsion between multiple orthogonal planes, just like how a butterfly, while gathering nectar, not only needs to fold its wings but also requires nonplanar twisting between the forewings and hindwings. Zhu and coworkers reported a series of diarylethenes incorporating different bulky terminal aryl groups based on a benzobis(thiadiazole) ethene bridge (Figure ). The series demonstrated highly reversible photosensitivity and thermal stability capable of a highly efficient and reversible off-to-on fluorescence process under alternating UV and visible light irradiation, exhibiting excellent fatigue resistance. The RIR acts as the driving force for AIE in the open isomer with rotational components, while the closed version with a vibratable axis owes its AIE nature to RIV (Figure ).