Luminescent chiral triangular prisms capable of forming double helices for detecting traces of acids and anion recognition

We synthesized a pair of tetraphenylethylene-based enantiomeric (R)- and (S)-Δ which form double helices. Acid-responsive luminescence of both triangles enables them detecting traces of acids in organic solvents such as CDCl 3 , CH 2 Cl 2 , CHCl 3 , etc.