Propeller-shaped luminescent molecules exhibiting circularly polarized luminescence can switch chirality depending on the solvent

https://phys.org/news/2025-10-propeller-luminescent-molecules-chirality-solvent.html

"molecule, of 6 highly emissive perylene diimide chromophores arranged like blades, obtained in high yield spontaneously twisting in optically active conformation, exhibiting bright circularly polarized luminescence... different helical conformations/ complete polarization inversion measured in chloroform versus dichloromethane solvent, caused by internal phenethyl groups' rotation... contrasts with static chiral molecular designs... optical switching, molecular sensors, polarization devices, quantum photonics"