Electrically-driven chiroptical switches based on axially dissymmetric 1,1'-binaphthyl and electrochromic viologens: synthesis and optical properties.

A novel redox type of chiral molecular switch based on axially dissymmetric 1,1'-binaphthyl and electrochromic 4,4'-bipyridinium exhibits drastic changes in absorption and circular dichroism spectra upon electrochemical redox reaction and is fully characterized for the electrically driven chiroptical switching properties.