Acidochromism of donor-acceptor Stenhouse adducts in organic solvent

First generation DASA derivatives can be reversibly isomerized from the coloured, open form to the colourless, closed isomer upon protonation, thus behaving as acidochromic compounds in halogenated organic solvent.

Automated summary

First generation DASA derivatives exhibit acidochromic characteristics in halogenated organic solvents, as they can reversibly isomerize from a colored, open form to a colorless, closed isomer upon protonation.